The check variant does not exist (see long text)

What causes this issue?

This check variant does not exist.

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?

If you are searching for a global check variant: Possibly there are
global check variants (for example, 'DEFAULT') in the system, but they
have not yet been imported into the Code Inspector. Use the following
menu path: Utilities -> Import Check Variants.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.