Sometimes, an Event will be entered multiple times in SYNCHRO Perform:
Events cannot be deleted, so if an Event is mistakenly duplicated, click on the duplicate, then add a Comment identifying which is the original Event (including its unique Event number):
Ensure all information is listed on the original Event, then click on 'Finish' and then 'Close' on the duplicate Event.
Refer to Creating Events and Updating Events guides for further information.