QuickBooks Online sync error: The vendorId cannot be updated on the Bill because there are existing payments

Why the sync error occurs

This error occurs because updates made to a bill aren't allowed to sync to QuickBooks Online if the bill is already marked as paid.

How to fix the sync error

  1. Verify the bill is accurate and marked as paid in QuickBooks Online
  2. Manually update the bill in QuickBooks Online, if needed
  3. Contact Customer Service to request that the error be cleared