Check table & does not exist or does not have any key fields

What causes this issue?

The specified check table either does not exist in an active version or
is only a structure. Check tables, however, must be database tables,
which means it must be possible to create these tables on the database
if necessary.
If only an inactive version exists for the specified check table, this
must be activated so that the table can be referenced.

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?

Correct the check table entry. If the check table is inactive, activate
it first.

Error message extract from SAP system. Copyright SAP SE.