I See Duplicate Events

You should not see multiple duplicates of the same event on the same calendar from OneCal. If you are seeing multiple clone instances of the same event, it is almost always due to one of these reasons:

1. Another sync system is active at the same time

Make sure you are not using another calendar sync system alongside OneCal. Users often try multiple sync systems and forget to disable them before trying a new one. If you have used another sync system before, revoke its calendar access to prevent interference.

2. You are viewing multiple calendars at once

OneCal copies events across multiple calendars. When you view all these calendars at the same time, you see one event for each calendar, which can feel overwhelming with more than 2 calendars. The OneCal Unified Calendar View helps here, as it can hide clone events and show only the original events.

3. More than one original copy of the event exists

Users sometimes manually copy events between calendars before using OneCal. OneCal cannot associate these pre-existing copies with each other, so it treats each one as an original event and clones them across the other calendars. To fix this, identify these old duplicates and remove them manually. Temporarily pausing your syncs can make this easier.

How to clean up the duplicates

Temporarily pause your sync: open the three dots menu at the end of the sync's row, select Pause, and in the dialog check Also delete clone events created by this sync. This removes all the clones OneCal created, and prevents further clones while you investigate. See Manage Your Syncs for details.

Once you are sure that no other sync system is active, that you are viewing one calendar at a time, and that you have removed any manual copies of the events, un-pause the sync. OneCal re-creates its clones automatically.

If you still run into issues after trying the above, please contact our support team so we can investigate further.