Account allocation & has been changed to & (Check)

What causes this issue?

Account allocation &V1& should not be changed. In general, it is
actually possible to change the account allocations since no postings
have been made to the asset.

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?

Take back the change of account allocation from &V1& to &V2&, or confirm
the change by pressing ENTER.

Error message extract from SAP system. Copyright SAP SE.