Account group in the IDoc is different

What causes this issue?

A change to the account group of a vendor master record cannot be made
automatically.
The vendor with number &V1& currently has account group &V2&. However,
the IDoc contains account group &V3&.

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?

Change the account group manually to &V3& and then try to edit the
IDoc.

Error message extract from SAP system. Copyright SAP SE.