Check the & records that have not yet been valuated

What causes this issue?

Subsequent calculation of value is, or was, active in your system. This
means that goods movements are not valuated when you enter them but are
valuated at a different point in time and in a separate valuation run.
However, you have not valuated all goods movements.

How to fix this error?

Valuate the goods movements that have not yet been valuated and
deactivate the procedure using transaction <DS:TRAN.MBWO>MBWO</>.
INCLUDE MMIM_RM07MWBU OBJECT DOKU ID TX LANGUAGE EN

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.