"Errors syncing invoice: Error: Duplicate Document Number Error : You must specify a different number. This number has already been used. DocNumber=2642-2 is assigned to TxnType=Credit Memo with TxnId=7046"
Fix invoice sync errors in QuickBooks Online caused by duplicate transaction numbers.
Issue
This error may occur if there is a credit memo in QuickBooks Online with the same transaction number as the invoice you're trying to import from ServiceBox.
Resolution
To resolve the error, try one of the following options:
Option 1: Change the Credit Memo Number
Update the transaction number of the credit memo in QuickBooks Online so that it no longer matches the invoice number.
Option 2: Cancel and Recreate the Invoice in ServiceBox
Cancel the invoice in ServiceBox and create a new one. The new invoice will have a different number that avoids the conflict.
Option 3: Allow Duplicate Transaction Numbers in QuickBooks Online
Adjust your QuickBooks Online settings to allow duplicate transaction numbers.
Refer to this QuickBooks article for instructions:
https://quickbooks.intuit.com/learn-support/en-us/reports-and-accounting/duplicate-invoice-numbers/00/187161
Need Help?
If you’re still encountering issues, contact our support team with the Help button in your account or by email at support@jobboxsoft.com.