Enter check table

What causes this issue?

You did not specify a check table for a foreign key.

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?

It is mandatory that you define a check table for a foreign key.
If it was your intention to delete the foreign key, activate the
function 'Delete' in the foreign key display.

Error message extract from SAP system. Copyright SAP SE.