diff --git a/services/serviceaccount/src/stackit/serviceaccount/models/access_token.py b/services/serviceaccount/src/stackit/serviceaccount/models/access_token.py
index 8aeee5414..7bb265cc6 100644
--- a/services/serviceaccount/src/stackit/serviceaccount/models/access_token.py
+++ b/services/serviceaccount/src/stackit/serviceaccount/models/access_token.py
@@ -15,10 +15,18 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBool, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBool,
+    StrictStr,
+    field_validator,
+)
 from typing_extensions import Self
 
 
@@ -39,6 +47,32 @@ class AccessToken(BaseModel):
     )
     __properties: ClassVar[List[str]] = ["active", "createdAt", "id", "token", "validUntil"]
 
+    @field_validator("created_at", mode="before")
+    def created_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
+    @field_validator("valid_until", mode="before")
+    def valid_until_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     model_config = ConfigDict(
         populate_by_name=True,
         validate_assignment=True,
diff --git a/services/serviceaccount/src/stackit/serviceaccount/models/access_token_metadata.py b/services/serviceaccount/src/stackit/serviceaccount/models/access_token_metadata.py
index df2ffbfe1..b3bd0779b 100644
--- a/services/serviceaccount/src/stackit/serviceaccount/models/access_token_metadata.py
+++ b/services/serviceaccount/src/stackit/serviceaccount/models/access_token_metadata.py
@@ -15,10 +15,18 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBool, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBool,
+    StrictStr,
+    field_validator,
+)
 from typing_extensions import Self
 
 
@@ -38,6 +46,32 @@ class AccessTokenMetadata(BaseModel):
     )
     __properties: ClassVar[List[str]] = ["active", "createdAt", "id", "validUntil"]
 
+    @field_validator("created_at", mode="before")
+    def created_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
+    @field_validator("valid_until", mode="before")
+    def valid_until_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     model_config = ConfigDict(
         populate_by_name=True,
         validate_assignment=True,
diff --git a/services/serviceaccount/src/stackit/serviceaccount/models/create_service_account_key_payload.py b/services/serviceaccount/src/stackit/serviceaccount/models/create_service_account_key_payload.py
index ab577b157..6865e45f3 100644
--- a/services/serviceaccount/src/stackit/serviceaccount/models/create_service_account_key_payload.py
+++ b/services/serviceaccount/src/stackit/serviceaccount/models/create_service_account_key_payload.py
@@ -15,6 +15,7 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
@@ -53,6 +54,19 @@ def algorithm_validate_enum(cls, value):
             raise ValueError("must be one of enum values ('RSA_2048', 'RSA_4096')")
         return value
 
+    @field_validator("valid_until", mode="before")
+    def valid_until_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     model_config = ConfigDict(
         populate_by_name=True,
         validate_assignment=True,
diff --git a/services/serviceaccount/src/stackit/serviceaccount/models/create_service_account_key_response.py b/services/serviceaccount/src/stackit/serviceaccount/models/create_service_account_key_response.py
index 5de09c8d0..72b1998fd 100644
--- a/services/serviceaccount/src/stackit/serviceaccount/models/create_service_account_key_response.py
+++ b/services/serviceaccount/src/stackit/serviceaccount/models/create_service_account_key_response.py
@@ -15,6 +15,7 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
@@ -63,6 +64,19 @@ class CreateServiceAccountKeyResponse(BaseModel):
         "validUntil",
     ]
 
+    @field_validator("created_at", mode="before")
+    def created_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     @field_validator("key_algorithm")
     def key_algorithm_validate_enum(cls, value):
         """Validates the enum"""
@@ -84,6 +98,19 @@ def key_type_validate_enum(cls, value):
             raise ValueError("must be one of enum values ('USER_MANAGED', 'SYSTEM_MANAGED')")
         return value
 
+    @field_validator("valid_until", mode="before")
+    def valid_until_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     model_config = ConfigDict(
         populate_by_name=True,
         validate_assignment=True,
diff --git a/services/serviceaccount/src/stackit/serviceaccount/models/error.py b/services/serviceaccount/src/stackit/serviceaccount/models/error.py
index 9c1bcb0f1..2016ce21c 100644
--- a/services/serviceaccount/src/stackit/serviceaccount/models/error.py
+++ b/services/serviceaccount/src/stackit/serviceaccount/models/error.py
@@ -15,10 +15,11 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
-from pydantic import BaseModel, ConfigDict, Field, StrictInt, StrictStr
+from pydantic import BaseModel, ConfigDict, Field, StrictInt, StrictStr, field_validator
 from typing_extensions import Self
 
 
@@ -34,6 +35,19 @@ class Error(BaseModel):
     time_stamp: datetime = Field(alias="timeStamp")
     __properties: ClassVar[List[str]] = ["error", "message", "path", "status", "timeStamp"]
 
+    @field_validator("time_stamp", mode="before")
+    def time_stamp_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     model_config = ConfigDict(
         populate_by_name=True,
         validate_assignment=True,
diff --git a/services/serviceaccount/src/stackit/serviceaccount/models/get_service_account_key_response.py b/services/serviceaccount/src/stackit/serviceaccount/models/get_service_account_key_response.py
index 998de674a..bcd33a0fc 100644
--- a/services/serviceaccount/src/stackit/serviceaccount/models/get_service_account_key_response.py
+++ b/services/serviceaccount/src/stackit/serviceaccount/models/get_service_account_key_response.py
@@ -15,6 +15,7 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
@@ -63,6 +64,19 @@ class GetServiceAccountKeyResponse(BaseModel):
         "validUntil",
     ]
 
+    @field_validator("created_at", mode="before")
+    def created_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     @field_validator("key_algorithm")
     def key_algorithm_validate_enum(cls, value):
         """Validates the enum"""
@@ -84,6 +98,19 @@ def key_type_validate_enum(cls, value):
             raise ValueError("must be one of enum values ('USER_MANAGED', 'SYSTEM_MANAGED')")
         return value
 
+    @field_validator("valid_until", mode="before")
+    def valid_until_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     model_config = ConfigDict(
         populate_by_name=True,
         validate_assignment=True,
diff --git a/services/serviceaccount/src/stackit/serviceaccount/models/partial_update_service_account_key_payload.py b/services/serviceaccount/src/stackit/serviceaccount/models/partial_update_service_account_key_payload.py
index c4c16a7fc..7bd9b1dd4 100644
--- a/services/serviceaccount/src/stackit/serviceaccount/models/partial_update_service_account_key_payload.py
+++ b/services/serviceaccount/src/stackit/serviceaccount/models/partial_update_service_account_key_payload.py
@@ -15,10 +15,11 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBool
+from pydantic import BaseModel, ConfigDict, Field, StrictBool, field_validator
 from typing_extensions import Self
 
 
@@ -37,6 +38,19 @@ class PartialUpdateServiceAccountKeyPayload(BaseModel):
     )
     __properties: ClassVar[List[str]] = ["active", "validUntil"]
 
+    @field_validator("valid_until", mode="before")
+    def valid_until_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     model_config = ConfigDict(
         populate_by_name=True,
         validate_assignment=True,
diff --git a/services/serviceaccount/src/stackit/serviceaccount/models/partial_update_service_account_key_response.py b/services/serviceaccount/src/stackit/serviceaccount/models/partial_update_service_account_key_response.py
index c567aea2b..cf6c64f6f 100644
--- a/services/serviceaccount/src/stackit/serviceaccount/models/partial_update_service_account_key_response.py
+++ b/services/serviceaccount/src/stackit/serviceaccount/models/partial_update_service_account_key_response.py
@@ -15,6 +15,7 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
@@ -53,6 +54,19 @@ class PartialUpdateServiceAccountKeyResponse(BaseModel):
         "validUntil",
     ]
 
+    @field_validator("created_at", mode="before")
+    def created_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     @field_validator("key_algorithm")
     def key_algorithm_validate_enum(cls, value):
         """Validates the enum"""
@@ -74,6 +88,19 @@ def key_type_validate_enum(cls, value):
             raise ValueError("must be one of enum values ('USER_MANAGED', 'SYSTEM_MANAGED')")
         return value
 
+    @field_validator("valid_until", mode="before")
+    def valid_until_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     model_config = ConfigDict(
         populate_by_name=True,
         validate_assignment=True,
diff --git a/services/serviceaccount/src/stackit/serviceaccount/models/service_account.py b/services/serviceaccount/src/stackit/serviceaccount/models/service_account.py
index 7d781fca1..ee257b1bd 100644
--- a/services/serviceaccount/src/stackit/serviceaccount/models/service_account.py
+++ b/services/serviceaccount/src/stackit/serviceaccount/models/service_account.py
@@ -17,7 +17,13 @@
 import pprint
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
-from pydantic import BaseModel, ConfigDict, Field, StrictBool, StrictStr
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    Field,
+    StrictBool,
+    StrictStr,
+)
 from typing_extensions import Self
 
 
diff --git a/services/serviceaccount/src/stackit/serviceaccount/models/service_account_key_list_response.py b/services/serviceaccount/src/stackit/serviceaccount/models/service_account_key_list_response.py
index 1e8c9c136..257d6b483 100644
--- a/services/serviceaccount/src/stackit/serviceaccount/models/service_account_key_list_response.py
+++ b/services/serviceaccount/src/stackit/serviceaccount/models/service_account_key_list_response.py
@@ -15,6 +15,7 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
@@ -53,6 +54,19 @@ class ServiceAccountKeyListResponse(BaseModel):
         "validUntil",
     ]
 
+    @field_validator("created_at", mode="before")
+    def created_at_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     @field_validator("key_algorithm")
     def key_algorithm_validate_enum(cls, value):
         """Validates the enum"""
@@ -74,6 +88,19 @@ def key_type_validate_enum(cls, value):
             raise ValueError("must be one of enum values ('USER_MANAGED', 'SYSTEM_MANAGED')")
         return value
 
+    @field_validator("valid_until", mode="before")
+    def valid_until_change_year_zero_to_one(cls, value):
+        """Workaround which prevents year 0 issue"""
+        if isinstance(value, str):
+            # Check for year "0000" at the beginning of the string
+            # This assumes common date formats like YYYY-MM-DDTHH:MM:SS+00:00 or YYYY-MM-DDTHH:MM:SSZ
+            if value.startswith("0000-01-01T") and re.match(
+                r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\+\d{2}:\d{2}|Z)$", value
+            ):
+                # Workaround: Replace "0000" with "0001"
+                return "0001" + value[4:]  # Take "0001" and append the rest of the string
+        return value
+
     model_config = ConfigDict(
         populate_by_name=True,
         validate_assignment=True,