Vague error code: Can't match for neo, CCBTE Txn Id null

[bjacobs]

In a well established system, I recently started getting an error code (when copying invoices) that doesn't make sense to me: "Business Validation Error: You've attempted to invoice for a charge, credit, billable expense, time, or estimate that does not exist or has already been invoiced. Can't match for neo, CCBTE Txn Id null"

In the attached request, there isn't any string about 'neo', CCBTE, and none of the transaction IDs are null. I am hoping for a clearer error code to be put in place.

qbxml.txt