Diagnosis
When you create a line item, you can only set the specification category
1 Payment specification required for payment program
The value '&V2&' transferred here in the field FKKOP-PDTYP is not
permitted.

System Response
Error message; the document cannot be posted.

Procedure
Contact your system administrator.

Procedure for System Administration
The value is either transferred by an interface program or set by event0606. Check the possible programs.