Duplicated events don't get synced properly

[devNan0]

Steps to reproduce

1.Create a event via WebUI or any CalDav client
2.Duplicate that event via the WebUI

Expected behavior

Duplicated event to be synced properly via CalDav

Actual behaviour

Duplicated event doesn't get synced properly via CalDav

But if i do this in the WebUI:

• Set "Show as" on the duplicated event to "Free"
• Hit Update
• Set "Show as" on the duplicated event back to "Busy"
• Hit Update

The event appears on my android

Calendar app version

3.5.0

CalDAV-clients used

DAVx5

Browser

91.13.0esr (64-bit)

Client operating system

Debian Bullseye / Andoird 11

Server operating system

Debian Bullseye (Nextcloud runs in Docker)

Web server

Apache

Database engine version

MariaDB

PHP engine version

PHP 8.0

Nextcloud version

24.0.5

Updated from an older installed version or fresh install

Updated from an older version

List of activated apps

No response

Nextcloud configuration

No response

Web server error log

No response

Log file

No response

Browser log

No response

Additional info

No response

[max65482]

Same issue for Thunderbird.
Interestingly, re-subscribing to the calendar is a workaround here.

[max65482]

Observation: I can only reproduce the issue with calendars that aren't my first calendar in the list. Duplicating works fine with the first calendar.