Where an Inventory Journal already exists, an invoice cannot be re-posted without first clearing the Journal.

Sync Unposted Invoices Records in Wise-Sync

Processing the "Unposted Invoices" in Wise-Sync will then batch this record to Xero:

Step: Click on the Journal Link from within the error message.

The Xero Record will then be displayed.

Void Xero Journal

Re-Sync the record in Wise-Sync