Inspection cannot be carried out due to invalid check variant

What causes this issue?

The check variant belonging to the inspection contains at least one
check that has become invalid due to a change in the check class on
which it is based (for example, through the transport of a new program
version).

System Response

The inspection cannot be performed with this check variant.

How to fix this error?

If the inspection has not yet been started, proceed to change mode for
the check variant used in this inspection and save this (if necessary,
with a new attribute selection).
If the inspection has terminated, the check variant can no longer be
changed. Create the check variant and the inspection once again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.