Calendar permissions can not delete

Good day,

After upgrading the system, users can not delete calendar setups. Where do I have to look, what change on controlling permissions over the calendar?

Riley

What calendar are you talking about? There are multiple apps in the Univention Appcenter, which provide a calendar.

OpenXchange Calendar

Riley

Message is : The operation could not be completed due to a concurrent modification. Please reload the data and try again.

 What path , what database holds the calendar  data.   This problem wasnt before upgrade

Riley

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