PROJECT BUDGET OVERRUN

Hi All,

Is it a standard of AX, to allow approval of budget revision which would cause the remaining budget to go negative?

I have tried revising a project Budget. The original budget is 100, consumed is 60, so my remaining is 40. I revised, deducting 50 from it. The system allowed it, causing the remaining budget to go negative.

My setup in Project is

-Active Budget Control

-Disallow overrun for Costs

Am I missing any setup or this is AX standard?

Thanks in Advance!

Bella