In T/code OBA5 you can change a message from warning to error or vice versa and the condition is that your work area exist there. For projects there is no Work area available there.
So the question is if I can do that for PS messages?
The message I want to change is CJ526 Finish date later than finish date & of the project. In T/code SE91 you can list all the PS messages.
Please let me know if you have any idea about this.