The object currency of & is & and not &

What causes this issue?

You made an assignment to &V1&. This object belongs to controlling area
&V4&. All objects in the controlling area must be recorded in company
code currency (&V3&). &V1& is defined with currency &V2&.

System Response

You cannot make a posting to this object.

How to fix this error?

Check whether other postings have been made to &V1&.
If not, change the object currency from &V1&.
If so, contact the SAP hotline service because these postings may have
caused data inconsistencies.

Error message extract from SAP system. Copyright SAP SE.