Getting planning exception workflow messages eventhough we removed employee mail id from planner cod

Hi,

We have created planner code where we associated employee name/mail address and assigned with FG which is a MPS planned method. When MPS plan completed , we were getting notifications. Then we removed employee email address( Not employee code) from planner code. When MPS completed, we still getting notifications. Can you anyone tell why we are getting notifications eventhough we removed mail address from planner code.