The selected contra items are not permitted and must be corrected.

What causes this issue?

The document specified does contain contra items, but they cannot be
processed here. Possible reasons for this are:

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

The contra item is on the credit side
The bill of exchange usage has already been posted
The clearing for the contra item has already been posted
The contra item was posted on the credit side (reverse posting)

System Response

Error message

How to fix this error?

Adjust or delete the entry.

Error message extract from SAP system. Copyright SAP SE.