diff --git a/homeassistant/components/toon/coordinator.py b/homeassistant/components/toon/coordinator.py
index 8e9722316e2..640fa9bb04e 100644
--- a/homeassistant/components/toon/coordinator.py
+++ b/homeassistant/components/toon/coordinator.py
@@ -71,6 +71,9 @@ class ToonDataUpdateCoordinator(DataUpdateCoordinator):
                 self.entry.data[CONF_WEBHOOK_ID]
             )
 
+        # Ensure the webhook is not registered already
+        webhook_unregister(self.hass, self.entry.data[CONF_WEBHOOK_ID])
+
         webhook_register(
             self.hass,
             DOMAIN,