&1: Mismatch of Field &2 between NewGL line item (&3) and BKPF/BSEG (&4)

What causes this issue?

This check compares field from entry view (BKPF, BSEG or BSEG_ADD) and
the NewGL line items (like FAGLFLEXA). The field &V2& differs. It is
&V3& in the NewGL line item and &V4& in either BKPF or BSEG
respectivelyBSEG_ADD.

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.