After you’ve created the SEA project the application switches over to the maintenance optimizer (MOPZ). This upcoming MOPZ transaction has to be finished including step 3 (download files) to get a proper result in SEA. In MOPZ the transaction can the saved, closed and continued later.
Withdrawing a MOPZ transaction terminates the corresponding SEA project. You have to start from scratch here (create a project, switch to mopz and execute the corresponding analysis). Another mopz transaction can’t be assigned to a running SEA project. You can either delete this project (my suggestion) or leave it as it is.