Field name 'KEY' can be used to check create/delete for table &

What causes this issue?

You have not specified a field name for table &V1&.

System Response

This field restriction is therefore not valid.

How to fix this error?

If you want to check the creation or deletion of records for table &V1&
in the change document, you can use the field name 'KEY'.

Error message extract from SAP system. Copyright SAP SE.