Budgeting on material Request

Hello

Im having an issue on budgeting on material request when using foreign currency USD.

Note that I have created a budget with the cost center st louis with an amount 200,000.See below snap shot
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When creating a material request with an amount(2 million in MUR)) greater than budgeted(200,000).the system should stop me from proceeding.however I am able to approved the material request.


Note that the following account and cost centers were used when creating the material request.
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