For company &, standardizing entry only possible in group currency

What causes this issue?

You tried to post to a <GL:company>company</> with
<DS:DE.RLEVL>posting level</> 1 which was entered in
<GL:group_currency>group currency</>.

System Response

In this case <GL:standardizing_entry>standardizing entries</> must also
be posted in group currency.

How to fix this error?

Please indicate the appropriate <GL:document_type>document type</> in
the document type definition with the account assignment in group
currency.

Error message extract from SAP system. Copyright SAP SE.