Verify that the registrant has only selected one registration option for an event:

  1. Open the exception batch
  2. Select Transactions, Review transaction details
  3. Select the Guests tab
  4. If more than one registration option for one event is set to 'Donor' you will receive the error
  5. Change the additional registration options to 'Unknown Guest' and save the batch
  6. Commit the batch and correct the registration in the event