SAP PS, F-02 BUDGET ERROR

hello my dear colleagues,

I am junior sap ps consultant.
There is something I want to ask you. My client wants his ps approved budget to be taken as a basis when assigning f-02 records. In other words, if the amount entered is greater than the approved budget, it should receive a budget overrun error. I couldn't find a way to do this, I'd be very grateful if you could help.
Thanks in advance :)