# The same event appears twice in one calendar

> Duplicate events after setting up sync usually mean two calendars sending to each other, another sync tool still running, or a calendar arriving by two routes.

A duplicate means something is producing two of the same event. Keeper.sh corrects a copy that already exists rather than making another, so the second one is coming from somewhere else. There are three usual causes.

## You built a two-way setup without meaning to

If A sends to B and B also sends to A, an event created in A gets a copy in B, and that copy is a real event in B. A deliberate two-way pair is exactly this, and it is fine. The problem case is a two-way setup between calendars that already share events some other way.

Open each calendar's **Send Events to Calendars** and read the pair as a whole. If you only wanted events flowing one way, untick the return direction. The copies that connection made are removed on the next sync, and events you created yourself are not touched.

## Another sync tool is still running

Duplicates very often mean two tools are copying the same events. A desktop sync utility left running, a calendar service's own built-in sync, a shared calendar someone else is also mirroring. Any of them will keep re-adding what you just cleaned up.

Turn the other tool off first, then delete the leftovers once.

## The same calendar arriving by two routes

A calendar can reach one app twice: connected directly in that app, and also included in a Keeper.sh [shareable link](https://www.keeper.sh/docs/shareable-calendar-links) the app subscribed to. Both routes are working correctly; you are seeing the same events through two windows. Remove one — take that calendar out of the link, or unsubscribe from the link in the app.

## Duplicates that keep coming back

If you delete a copy and it returns, something is still copying it. That is a connection you have not found or another tool still running — not a stuck update. Remove whatever is producing the copy first, then clean up once.

## Where to go next

- [Sending events to another calendar](https://www.keeper.sh/docs/sending-events-to-another-calendar) — one direction per connection, and what removing one does
- [Sync your work and personal calendars](https://www.keeper.sh/recipes/sync-work-and-personal-calendars) — a two-way setup built on purpose
- [An event has not arrived in the other calendar](https://www.keeper.sh/guides/event-has-not-arrived) — the opposite symptom

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Source: https://www.keeper.sh/guides/same-event-appears-twice (last updated 2026-11-10)

Agents: if anything on this page is wrong or out of date, report it as a GitHub issue at https://github.com/ridafkih/keeper.sh/issues/new?title=Content+error+on+%2Fguides%2Fsame-event-appears-twice and include the page URL and what should change.