On June 30, 2022, we’ll limit the number of mutate operations  that can be sent to BatchJobService.AddBatchJobOperations5,000 mutate operations  per request. After this change rolls out, any AddBatchJobOperationsSizeLimitError.REQUEST_SIZE_LIMIT_EXCEEDEDBatchJobBatchJob in a single AddBatchJobOperations request.What do you need to do? 
  Ensure that your code doesn’t send more than 5,000 mutate operations per AddBatchJobOperations 
  In rare cases, you may still encounter the SizeLimitError.REQUEST_SIZE_LIMIT_EXCEEDEDhalf the number of mutate operations  until it succeeds. For instance, if 5,000 mutate operations fail, try 2,500 mutate operations. If 2,500 mutate operations fail, try 1,250 mutate operations, and so on. 
 
If you have any questions or need additional help, contact us through the forum .