Resource requirements not getting recalculated

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Hello All,

I am trying to run a simulation by creating a manual demand in the plan. The resource utilisation on a particular week was 50 prior to creating manual demand. After the manual demand was created and the plan was run with "Do not refresh with current data", additional planned order was created to satisfy the manual demand. This however didn't change resource requirements and in turn the utilisation. They remained the same. Is this an expected behaviour?

Thanks,

Anand