Valuation grouping code was not defined for valuation area &

What causes this issue?

No valuation grouping code has been defined for valuation area &V1&.
A valuation grouping code is a supradefinition of the valuation area.
It is intended to facilitate the management of standard accounts for
automatic postings within the framework of inventory management and
invoice verification by minimizing the number of entries.
Valuation areas that are to be treated the same way in terms of account
assignment are to be defined with the same valuation grouping code.
Valuation grouping codes either represent a fine differentiation within
a chart of accounts or correspond to one chart of accounts (i.e. 1:1).
Therefore, only those valuation areas that relate (via the company
code) to the same chart of accounts should be grouped together under
the same valuation grouping code.

System Response

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

WHAT_TO_DO&
Please define a <DS:TRANS.OMWD>valuation grouping code</> for valuation
area &V1&.

Error message extract from SAP system. Copyright SAP SE.