Symptom
When you maintain conditions in a pricing condition group, if you create or change a rule set, the system checks this rule set against other conditions in the pricing hierarchy. These checks may fail and the system may issue error messages. If the user exits the error message display, in order to correct their previous entries immediately, they notice that the system has discarded all of the entries that they just made and has reset the fields of the rule set to their old field values. Instead, the user expects the system to retain the incorrect entries so that they can correct their errors.

Reason and Prerequisites
There is a program error.

Solution
Import the Support Package that is relevant for your
release. You can implement the following correction instructions in advance using
transaction SNOTE.