Some error at 6.4.0

ERROR in ./node_modules/mqtt-packet/node_modules/bl/BufferList.js
Module build failed (from ./node_modules/babel-loader/lib/index.js):
SyntaxError: "copy" is read-only

 78 | BufferList.prototype.copy = function copy (dst, dstStart, srcStart, srcEnd) {
     |                             ^
  79 |   if (typeof srcStart !== 'number' || srcStart < 0) {
  80 |     srcStart = 0
  81 |   }