Invoice validation concurrent program putting a hold after invoice is validated online manually

Hi

We created a PO match invoice and while validation it put a hold named:NTL UTX ERROR:

The hold was put by the system:

Hold name:NTL UTX ERROR

Hold reason:Tax Error:Invalid tax GL codecombination iD

We relaeased the hold by clicking the action button and checking release hold option giving release name as quick release and we checked the validte button

invoice got validated.

but again when we submitted the invoice validation concurrent pgm for this invoice it had put the hold back.

can you please explain why this happens.

Even after the invoice is validated online but concurrent pgm putting hold.