Characteristic &1 no longer exists in the system; see long text

What causes this issue?

The characteristic is no longer available in the system because it was
deleted. When a characteristic is deleted, the characteristic values and
characteristic value groups remain in the database.

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 want to completely delete the characteristic values <ZH>or</>
characteristic value groups, use the <ZH>respective pushbuttons</>.
If you want to completely delete the characteristic values <ZH>and</>
the characteristic value groups, start <ZH>deletion program
RWRF_CHARVAL_REORG</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.