Customer has been using Purchase Quote approvals and raising PO's from them without issue for some time.
Since the 16.2 update the PQ is no longer able to be raised as a PO.
Receiveing a warning that the record in the Purchase Line already exists with the next PO No. in the series.
This is definitely not the case. No PO entry exists for that number, nor is there a no. series issue.
(A PO can be raised directly without issue. Also increasing the no.series results in whatever declared next no. being unable to be used)

Has anyone else found this same issue, or a way around it?
Many thanks
Kind Regards
John