Rate class invalid for the corresponding profile rate category

What causes this issue?

There is an inconsistency between the rate category and the condition
type of the rate class. The rate category has the attribute <LB>Header
Level</> or <LB>Item Level </>and the condition type is not defined for
this level.

System Response

If there is a mismatch, the system does not allow you to map the rate
class.

How to fix this error?

Do one of the following in the Customizing activity
<DS:SIMG./CPD/PWS_RCB_CDATA>Make Settings for Rate Classes</>:
Change the rate category of the profile.
In the <ZK>Rate Class Mapping</> activity, choose an appropriate rate
class for the profile.
In the <ZK>Rate Class</> activity, you can either
Choose an appropriate condition type.
Create another rate class.
In the Customizing activity
<DS:SIMG.SIMG_CFMENUOLSDVOK0>Define Condition Types</>, modify the
setting of the condition type (<ZK>Changes which can be made</>) so that
it can be used in the header, the item level, or both.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.