[Bug]: no clean cleanup for calendars + bug to create new calendar events

⚠️ 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

https://github.com/nextcloud/calendar/issues/6925

I can't create new Events because the URI will get to long, and I can't find any way to clean up old events from the DB.

Steps to reproduce

Create many events like via vdirsyncer and force delete them, and recreate the events new with updated events.

Expected behavior

No problems with the URI lenght when we delete entries. Have a maintaince script to clean up old calendar data.

Nextcloud Server version

31

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.4

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

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

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{"reqId":"IplQaUIuiROPkVeUbGeV","level":0,"time":"2025-04-23T04:42:29+00:00","remoteAddr":"217.93.33.110","user":false,"app":"bruteForce","method":"PUT","url":"/remote.php/dav/calendars/UserReplaced/abc-schichten/6938e6d4-9ff4-41c1-a134-a54783954f91.ics","message":"The loading of lazy AppConfig values have been triggered by app \"bruteForce\"","userAgent":"vdirsyncer/0.19.3","version":"31.0.4.1","exception":{"Exception":"RuntimeException","Message":"The loading of lazy AppConfig values have been triggered by app \"bruteForce\"","Code":0,"Trace":[{"file":"/app/www/public/lib/private/AppConfig.php","line":1193,"function":"loadConfig","class":"OC\\AppConfig","type":"->"},{"file":"/app/www/public/lib/private/AppConfig.php","line":106,"function":"loadConfigAll","class":"OC\\AppConfig","type":"->"},{"file":"/app/www/public/lib/private/Security/Ip/BruteforceAllowList.php","line":39,"function":"getKeys","class":"OC\\AppConfig","type":"->"},{"file":"/app/www/public/lib/private/Security/Bruteforce/Throttler.php","line":86,"function":"isBypassListed","class":"OC\\Security\\Ip\\BruteforceAllowList","type":"->"},{"file":"/app/www/public/lib/private/Security/Bruteforce/Throttler.php","line":112,"function":"isBypassListed","class":"OC\\Security\\Bruteforce\\Throttler","type":"->"},{"file":"/app/www/public/lib/private/Security/Bruteforce/Throttler.php","line":129,"function":"getAttempts","class":"OC\\Security\\Bruteforce\\Throttler","type":"->"},{"file":"/app/www/public/lib/private/Security/Bruteforce/Throttler.php","line":202,"function":"getDelay","class":"OC\\Security\\Bruteforce\\Throttler","type":"->"},{"file":"/app/www/public/lib/private/User/Session.php","line":384,"function":"sleepDelayOrThrowOnMax","class":"OC\\Security\\Bruteforce\\Throttler","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/Connector/Sabre/Auth.php","line":80,"function":"logClientIn","class":"OC\\User\\Session","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Auth/Backend/AbstractBasic.php","line":103,"function":"validateUserPass","class":"OCA\\DAV\\Connector\\Sabre\\Auth","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/config/www/nextcloud/apps/dav/lib/Connector/Sabre/Auth.php","line":191,"function":"check","class":"Sabre\\DAV\\Auth\\Backend\\AbstractBasic","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/Connector/Sabre/Auth.php","line":105,"function":"auth","class":"OCA\\DAV\\Connector\\Sabre\\Auth","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Auth/Plugin.php","line":179,"function":"check","class":"OCA\\DAV\\Connector\\Sabre\\Auth","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Auth/Plugin.php","line":135,"function":"check","class":"Sabre\\DAV\\Auth\\Plugin","type":"->"},{"file":"/app/www/public/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"beforeMethod","class":"Sabre\\DAV\\Auth\\Plugin","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":456,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/Connector/Sabre/Server.php","line":49,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/Server.php","line":398,"function":"start","class":"OCA\\DAV\\Connector\\Sabre\\Server","type":"->"},{"file":"/config/www/nextcloud/apps/dav/appinfo/v2/remote.php","line":21,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/app/www/public/remote.php","line":145,"args":["/config/www/nextcloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/app/www/public/lib/private/AppConfig.php","Line":1208,"message":"The loading of lazy AppConfig values have been triggered by app \"bruteForce\"","exception":{},"CustomMessage":"The loading of lazy AppConfig values have been triggered by app \"bruteForce\""}}
{"reqId":"IplQaUIuiROPkVeUbGeV","level":0,"time":"2025-04-23T04:42:29+00:00","remoteAddr":"217.93.33.110","user":"UserReplaced","app":"dav","method":"PUT","url":"/remote.php/dav/calendars/UserReplaced/abc-schichten/6938e6d4-9ff4-41c1-a134-a54783954f91.ics","message":"Activity generated for a calendar object of calendar 22 that is moved to trash","userAgent":"vdirsyncer/0.19.3","version":"31.0.4.1","data":{"app":"dav"}}
{"reqId":"IplQaUIuiROPkVeUbGeV","level":0,"time":"2025-04-23T04:42:29+00:00","remoteAddr":"217.93.33.110","user":"UserReplaced","app":"dav","method":"PUT","url":"/remote.php/dav/calendars/UserReplaced/abc-schichten/6938e6d4-9ff4-41c1-a134-a54783954f91.ics","message":"Reminders of restored calendar object of calendar 22 deleted","userAgent":"vdirsyncer/0.19.3","version":"31.0.4.1","data":{"app":"dav"}}
{"reqId":"IplQaUIuiROPkVeUbGeV","level":3,"time":"2025-04-23T04:42:29+00:00","remoteAddr":"217.93.33.110","user":"UserReplaced","app":"webdav","method":"PUT","url":"/remote.php/dav/calendars/UserReplaced/abc-schichten/6938e6d4-9ff4-41c1-a134-a54783954f91.ics","message":"An exception occurred while executing a query: SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column 'uri' at row 1","userAgent":"vdirsyncer/0.19.3","version":"31.0.4.1","exception":{"Exception":"OC\\DB\\Exceptions\\DbalException","Message":"An exception occurred while executing a query: SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column 'uri' at row 1","Code":1406,"Trace":[{"file":"/app/www/public/lib/private/DB/ConnectionAdapter.php","line":69,"function":"wrap","class":"OC\\DB\\Exceptions\\DbalException","type":"::"},{"file":"/app/www/public/lib/private/DB/QueryBuilder/QueryBuilder.php","line":306,"function":"executeStatement","class":"OC\\DB\\ConnectionAdapter","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":2946,"function":"executeStatement","class":"OC\\DB\\QueryBuilder\\QueryBuilder","type":"->"},{"file":"/app/www/public/lib/public/AppFramework/Db/TTransactional.php","line":45,"function":"OCA\\DAV\\CalDAV\\{closure}","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":2925,"function":"atomic","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":1570,"function":"addChanges","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->"},{"file":"/app/www/public/lib/public/AppFramework/Db/TTransactional.php","line":45,"function":"OCA\\DAV\\CalDAV\\{closure}","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":1488,"function":"atomic","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":1295,"function":"deleteCalendarObject","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->"},{"file":"/app/www/public/lib/public/AppFramework/Db/TTransactional.php","line":45,"function":"OCA\\DAV\\CalDAV\\{closure}","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":1265,"function":"atomic","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/CalDAV/Calendar.php","line":199,"function":"createCalendarObject","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":1098,"function":"createFile","class":"Sabre\\CalDAV\\Calendar","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":504,"function":"createFile","class":"Sabre\\DAV\\Server","type":"->","args":["*** sensitive parameters replaced 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exception occurred while executing a query: SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column 'uri' at row 1","Code":1406,"Trace":[{"file":"/app/www/public/3rdparty/doctrine/dbal/src/Connection.php","line":1976,"function":"convert","class":"Doctrine\\DBAL\\Driver\\API\\MySQL\\ExceptionConverter","type":"->"},{"file":"/app/www/public/3rdparty/doctrine/dbal/src/Connection.php","line":1918,"function":"handleDriverException","class":"Doctrine\\DBAL\\Connection","type":"->"},{"file":"/app/www/public/3rdparty/doctrine/dbal/src/Connection.php","line":1218,"function":"convertExceptionDuringQuery","class":"Doctrine\\DBAL\\Connection","type":"->"},{"file":"/app/www/public/3rdparty/doctrine/dbal/src/Connections/PrimaryReadReplicaConnection.php","line":292,"function":"executeStatement","class":"Doctrine\\DBAL\\Connection","type":"->"},{"file":"/app/www/public/lib/private/DB/Connection.php","line":466,"function":"executeStatement","class":"Doctrine\\DBAL\\Connections\\PrimaryReadReplicaConnection","type":"->"},{"file":"/app/www/public/lib/private/DB/ConnectionAdapter.php","line":67,"function":"executeStatement","class":"OC\\DB\\Connection","type":"->"},{"file":"/app/www/public/lib/private/DB/QueryBuilder/QueryBuilder.php","line":306,"function":"executeStatement","class":"OC\\DB\\ConnectionAdapter","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":2946,"function":"executeStatement","class":"OC\\DB\\QueryBuilder\\QueryBuilder","type":"->"},{"file":"/app/www/public/lib/public/AppFramework/Db/TTransactional.php","line":45,"function":"OCA\\DAV\\CalDAV\\{closure}","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->","args":["*** 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String data, right truncated: 1406 Data too long for column 'uri' at row 1","Code":1406,"Trace":[{"file":"/app/www/public/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php","line":132,"function":"new","class":"Doctrine\\DBAL\\Driver\\PDO\\Exception","type":"::"},{"file":"/app/www/public/3rdparty/doctrine/dbal/src/Connection.php","line":1212,"function":"execute","class":"Doctrine\\DBAL\\Driver\\PDO\\Statement","type":"->"},{"file":"/app/www/public/3rdparty/doctrine/dbal/src/Connections/PrimaryReadReplicaConnection.php","line":292,"function":"executeStatement","class":"Doctrine\\DBAL\\Connection","type":"->"},{"file":"/app/www/public/lib/private/DB/Connection.php","line":466,"function":"executeStatement","class":"Doctrine\\DBAL\\Connections\\PrimaryReadReplicaConnection","type":"->"},{"file":"/app/www/public/lib/private/DB/ConnectionAdapter.php","line":67,"function":"executeStatement","class":"OC\\DB\\Connection","type":"->"},{"file":"/app/www/public/lib/private/DB/QueryBuilder/QueryBuilder.php","line":306,"function":"executeStatement","class":"OC\\DB\\ConnectionAdapter","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":2946,"function":"executeStatement","class":"OC\\DB\\QueryBuilder\\QueryBuilder","type":"->"},{"file":"/app/www/public/lib/public/AppFramework/Db/TTransactional.php","line":45,"function":"OCA\\DAV\\CalDAV\\{closure}","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->","args":["*** 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1","Code":"22001","Trace":[{"file":"/app/www/public/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php","line":130,"function":"execute","class":"PDOStatement","type":"->"},{"file":"/app/www/public/3rdparty/doctrine/dbal/src/Connection.php","line":1212,"function":"execute","class":"Doctrine\\DBAL\\Driver\\PDO\\Statement","type":"->"},{"file":"/app/www/public/3rdparty/doctrine/dbal/src/Connections/PrimaryReadReplicaConnection.php","line":292,"function":"executeStatement","class":"Doctrine\\DBAL\\Connection","type":"->"},{"file":"/app/www/public/lib/private/DB/Connection.php","line":466,"function":"executeStatement","class":"Doctrine\\DBAL\\Connections\\PrimaryReadReplicaConnection","type":"->"},{"file":"/app/www/public/lib/private/DB/ConnectionAdapter.php","line":67,"function":"executeStatement","class":"OC\\DB\\Connection","type":"->"},{"file":"/app/www/public/lib/private/DB/QueryBuilder/QueryBuilder.php","line":306,"function":"executeStatement","class":"OC\\DB\\ConnectionAdapter","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":2946,"function":"executeStatement","class":"OC\\DB\\QueryBuilder\\QueryBuilder","type":"->"},{"file":"/app/www/public/lib/public/AppFramework/Db/TTransactional.php","line":45,"function":"OCA\\DAV\\CalDAV\\{closure}","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->","args":["*** 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***"]},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":1488,"function":"atomic","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":1295,"function":"deleteCalendarObject","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->"},{"file":"/app/www/public/lib/public/AppFramework/Db/TTransactional.php","line":45,"function":"OCA\\DAV\\CalDAV\\{closure}","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/config/www/nextcloud/apps/dav/lib/CalDAV/CalDavBackend.php","line":1265,"function":"atomic","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/CalDAV/Calendar.php","line":199,"function":"createCalendarObject","class":"OCA\\DAV\\CalDAV\\CalDavBackend","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":1098,"function":"createFile","class":"Sabre\\CalDAV\\Calendar","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":504,"function":"createFile","class":"Sabre\\DAV\\Server","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/app/www/public/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPut","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/app/www/public/3rdparty/sabre/dav/lib/DAV/Server.php","line":472,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/Connector/Sabre/Server.php","line":49,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/config/www/nextcloud/apps/dav/lib/Server.php","line":398,"function":"start","class":"OCA\\DAV\\Connector\\Sabre\\Server","type":"->"},{"file":"/config/www/nextcloud/apps/dav/appinfo/v2/remote.php","line":21,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/app/www/public/remote.php","line":145,"args":["/config/www/nextcloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/app/www/public/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php","Line":130}}},"message":"An exception occurred while executing a query: SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column 'uri' at row 1","exception":{"query":"INSERT INTO `*PREFIX*calendarchanges` (`uri`, `synctoken`, `calendarid`, `operation`, `calendartype`, `created_at`) VALUES(:uri, :dcValue1, :dcValue2, :dcValue3, :dcValue4, 1745383349)"},"CustomMessage":"An exception occurred while executing a query: SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column 'uri' at row 1"}}

Additional info

No response

Start in apps/dav/lib/CalDAV/CalDavBackend.php, especially deleteCalendarObject and addChanges around the reported failure at line 2946, and trace the DAV PUT flow shown in the issue. Determine the intended cleanup behavior for deleted calendar objects and the URI-length failure; done means the reported event recreation flow no longer fails and cleanup behavior is covered by an appropriate test.