Delete a role in an existing Project

Hello,

I would like to know what could be the consequences when we delete a role in an existing project ? Will the plan and actual from the past will be change from systems ?

Ex- If there is a existing project with some roles in cProject and some recourse are assigned to these roles... If i delete these roles will there be any change in Plan and Actual value?

and will the budget for that project change?

Regards,

Roshan