Hi SAP Gurus, I'm a rookie and I need your help.
A user reported to me that the bill plan of rental contracts she created with a user status: Approved can be changed when it's supposed not to change.
I checked the config for Status Profile used in the contracts. (See config below)


& based from what I understand in the configuration, there's no indicated business transaction that prevents changing the bill plan/document. Is that correct?
If that's the case, then my next dilemma is why there are times when approved contracts allow changes in bill plan; also, there are times when it doesn't allow the changes? The behavior is so random and inconsistent that I have no idea why. Is there something I'm missing out? Can you suggest steps on how I could figure out this unusual behavior?