Budget exceeded error while creating purchase order

Dear Experts,

I am facing an issue in budget tolerance. I have set tolerance limit for PO that system will give warning in 90% usage and it will give error in 105% usage.

Budget will be checked on overall budget and we have budget release functionality. Availability control is active.

Now my overall budget for a WBS is INR 100,000 and released is INR 100,000.

While creating purchase order (PO) of INR 104,000 I am getting a budget exceeded error of INR 4000. But ideally it should allow to save PO as per setting only if I increase the value of the PO by 105% of budget then only I should get the error message.

Please advise to resolve the problem.

Regards,

Avinash P