You can specify a tolerance only for a maximum amount license

What causes this issue?

You tried to enter a tolerance on a percentage basis although no
maximum amount is assigned to this license type. This means that the
system does not have to carry out a value update.

System Response

The system does not allow this entry.

How to fix this error?

Maintain the license type so that a maximum amount can be assigend to
this license type.

Error message extract from SAP system. Copyright SAP SE.