Click on the Gear in the Action Keys of the Event you want to keep. If you are not sure which one to start with, use the one that has officials, workers, and tickets assigned to it. If you don’t extras assigned to the event,, you can use either event.
Click on "Settings"
Click on "Event" in the task bar
Click on "Manage"
Click on the Big Action key "Manage Event" in the upper right corner
Click on "Merge Event"
Click on "Merge"
Click on "Merge"
Click on "Back to Events"
View your two competitions in the same event with all of the ticketing, workers, officials, etc still there.