Cannot edit object &1, lock conflict

What causes this issue?

Some subobjects of &V1& are assigned to different requests.

System Response

The function terminates.

How to fix this error?

Make sure that you only edit the subobjects of &V1& in the same request
and repeat the action.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.