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+---
+author: epenet
+authorURL: https://github.com/epenet
+title: "New checks for config flow unique ID"
+---
+
+### Summary of changes
+
+When a config flow creates an entry with a colliding unique ID, the old entry is currently automatically removed and replaced with the new config entry.
+This can lead to unexpected behavior, and integrations should be adjusted to instead abort the flow.
+
+In case of manual flows, integrations should implement options, reauth, reconfigure to allow the user to change settings.
+In case of non user visible flows, the integration should optionally update the existing entry before aborting.
+
+More details can be found in the [config flow](/docs/config_entries_config_flow_handler#unique-id-requirements) documentation.