After update to 2023.4 I started to see some iCal related errors, not seen before:
2023-05-02 10:47:46.671 ERROR (SyncWorker_1) [root] Ical data was modified to avoid compatibility issues. (error count: 32 - this error is ratelimited)
NoneType: None
2023-05-02 10:47:46.671 ERROR (SyncWorker_1) [root] ---
+++
@@ -14,7 +14,6 @@
DESCRIPTION:
LOCATION:
RECURRENCE-ID;TZID=Europe/Warsaw:20230503T000000
-DURATION:PT23H30M
END:VEVENT
END:VCALENDAR
These errors repeat in log file throughout the day. Nothing changed in my setup regarding this integration, so perhaps this is linked with this version of HA? Any thoughts what is causing these and how to remediate? Otherwise integration seens to work… BTW I use this with Synology Calendar.