[Bug]: Removing calendar event from trashbin triggers second canceled notification

[flortsch]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

After removing a calendar event, a canceled notification is sent to event participants, and the event is moved into the trashbin of the calendar. Now, when removing the same calendar event from the trashbin (single delete or empty trashbin), a second canceled notification is send to event participants. Imo, this is a bug and a second calendar notification should not be send out for these kind of deletes.

Steps to reproduce

1. Create calendar event with participant
2. Remove calendar event from calendar (triggers canceled notification)
3. Remove same calendar event from trashbin (triggers second canceled notification)

Expected behavior

After removing a calendar event from the trashbin, a second canceled notification should not be sent out.

Installation method

Community Docker image

Nextcloud Server version

27

Operating system

Debian/Ubuntu

PHP engine version

None

Web server

Nginx

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

[brad2014]

I suspect this is a duplicate of (or related to) #36051

[SebastianKrupinski]

Duplicate of #45677