[Bug]: Dirty table reads exception when converting Calendar Proposal - Nextcloud 33.0.2

The Basics

  • Nextcloud Server version
    • 33.0.2
  • Operating system and version:
    • Ubuntu 24.04.3 LTS
  • Web server and version:
    • Apache
  • Reverse proxy and version _(e.g. nginx 1.27.2)
    • traefik 3.6.5
  • PHP version (e.g, 8.3):
    • 8.4.20
  • Is this the first time you’ve seen this error? (Yes / No):
    • Yes
  • When did this problem seem to first start?
    • Immediately after upgrading from 32.0.5 to 33.0.2
  • Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
    • Docker Official Image
  • Are you using CloudfIare, mod_security, or similar? (Yes / No)
    • no

Summary of the issue you are facing:

[…]

Steps to replicate it (hint: details matter!):

  1. Create a proposal with user A and invite user B

  2. User B accept proposal

  3. User A create event from proposal

  4. User A see the event on calendar, user B not

Log entries

Nextcloud

Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.

PASTE HE{
  "reqId": "R6L6uqBQWoIvGqddN7oa",
  "level": 0,
  "time": "2026-04-23T14:58:44+00:00",
  "remoteAddr": "xxxxxxx",
  "user": "admin",
  "app": "no app in context",
  "method": "POST",
  "url": "/ocs/v2.php/calendar/proposal/create",
  "message": "dirty table reads: SELECT * FROM `*PREFIX*calendar_proposal_dts` WHERE (`uid` = :dcValue1) AND (`id` = :dcValue2)",
  "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:149.0) Gecko/20100101 Firefox/149.0",
  "version": "33.0.2.2",
  "exception": {
    "Exception": "Exception",
    "Message": "dirty table reads: SELECT * FROM `*PREFIX*calendar_proposal_dts` WHERE (`uid` = :dcValue1) AND (`id` = :dcValue2)",
    "Code": 0,
    "Trace": [
      { "file": "/var/www/html/lib/private/DB/ConnectionAdapter.php", "line": 50, "function": "executeQuery" },
      { "file": "/var/www/html/custom_apps/calendar/lib/Db/ProposalMapper.php", "line": 36, "function": "findEntity" },
      { "file": "/var/www/html/custom_apps/calendar/lib/Service/Proposal/ProposalService.php", "line": 129, "function": "fetchById" },
      { "file": "/var/www/html/custom_apps/calendar/lib/Controller/ProposalController.php", "line": 125, "function": "createProposal" }
    ],
    "CustomMessage": "dirty table reads: SELECT * FROM `*PREFIX*calendar_proposal_dts` WHERE (`uid` = :dcValue1) AND (`id` = :dcValue2)"
  }
}RE

Configuration

Nextcloud

The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):

{
    "system": {
        "htaccess.RewriteBase": "\/",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "overwritehost": "***REMOVED SENSITIVE VALUE***",
        "overwriteprotocol": "https",
        "upgrade.disable-web": true,
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "192.168.1.169",
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "33.0.2.2",
        "overwrite.cli.url": "https:\/\/***REMOVED SENSITIVE VALUE***",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "allow_local_remote_servers": true,
        "config_preset": 8,
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "maintenance": false,
        "logfile_audit": "\/var\/www\/html\/data\/audit.log",
        "loglevel": 0,
        "log_rotate_size": 104857600,
        "log.condition": {
            "apps": [
                "admin_audit"
            ]
        },
        "defaultapp": "dashboard,mail,files",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_from_address_label": "Nextcloud STAGING",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "mail_smtpauth": true,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpsecure": "ssl",
        "forbidden_filename_basenames": [
            "con",
            "prn",
            "aux",
            "nul",
            "com0",
            "com1",
            "com2",
            "com3",
            "com4",
            "com5",
            "com6",
            "com7",
            "com8",
            "com9",
            "com\u00b9",
            "com\u00b2",
            "com\u00b3",
            "lpt0",
            "lpt1",
            "lpt2",
            "lpt3",
            "lpt4",
            "lpt5",
            "lpt6",
            "lpt7",
            "lpt8",
            "lpt9",
            "lpt\u00b9",
            "lpt\u00b2",
            "lpt\u00b3"
        ],
        "forbidden_filename_characters": [
            "<",
            ">",
            ":",
            "\"",
            "|",
            "?",
            "*",
            "\\",
            "\/"
        ],
        "forbidden_filename_extensions": [
            " ",
            ".",
            ".filepart",
            ".part"
        ],
        "skeletondirectory": "",
        "maintenance_window_start": 1,
        "app_install_overwrite": [
            "twothousandandfortyeight",
            "solitaire"
        ],
        "mail_template_class": "OCA\\MyBranding\\Mail\\Template",
        "jwt_auth_leeway": 30,
        "bruteforce": {
            "whitelist": [
                "192.168.1.168",
                "172.18.0.1"
            ]
        },
        "auth.bruteforce.protection.enabled": true,
        "bruteaccesscontrol.whitelist.1": "172.18.0.1",
        "data-fingerprint": "d12b6a6035c697478c68c862f5c51694",
        "db.transaction_isolation_level": 1
    }
}

Apps

The output of occ app:list (if possible).

Enabled:

  • activity: 6.0.0
  • announcementcenter: 7.3.0
  • app_api: 33.0.0
  • bruteforcesettings: 6.0.0
  • calendar: 6.2.2
  • calendar_resource_management: 0.11.0
  • call_summary_bot: 3.3.0
  • circles: 33.0.0
  • cloud_federation_api: 1.17.0
  • collectives: 4.3.0
  • comments: 1.23.0
  • contacts: 8.4.4
  • contactsinteraction: 1.14.1
  • dashboard: 7.13.0
  • dav: 1.36.0
  • doom_nextcloud: 1.0.8
  • event_update_notification: 2.8.0
  • federatedfilesharing: 1.23.0
  • federation: 1.23.0
  • files: 2.5.0
  • files_downloadlimit: 5.1.0
  • files_pdfviewer: 6.0.0
  • files_reminders: 1.6.0
  • files_sharing: 1.25.2
  • files_trashbin: 1.23.0
  • files_versions: 1.26.0
  • firstrunwizard: 6.0.0
  • groupfolders: 21.0.7
  • guests: 4.6.0
  • logreader: 6.0.0
  • lookup_server_connector: 1.21.0
  • nextcloud_announcements: 5.0.0
  • notes: 4.13.1
  • notifications: 6.0.0
  • oauth2: 1.21.0
  • password_policy: 5.0.0
  • photos: 6.0.0
  • polls: 9.0.1
  • privacy: 5.0.0
  • profile: 1.2.0
  • provisioning_api: 1.23.0
  • recommendations: 6.0.0
  • related_resources: 4.0.0
  • serverinfo: 5.0.0
  • settings: 1.16.0
  • sharebymail: 1.23.0
  • support: 5.0.0
  • survey_client: 5.0.0
  • systemtags: 1.23.0
  • text: 7.0.0
  • theming: 2.8.0
  • twofactor_backupcodes: 1.22.0
  • twofactor_totp: 15.0.0
  • updatenotification: 1.23.0
  • user_status: 1.13.0
  • viewer: 6.0.0
  • weather_status: 1.13.0
  • webhook_listeners: 1.5.0
  • whiteboard: 1.5.7
  • workflowengine: 2.15.0
    Disabled:
  • admin_audit: 1.23.0 (installed 1.22.0)
  • cospend: 4.0.0 (installed 4.0.0)
  • deck: 1.17.1 (installed 1.17.1)
  • encryption: 2.21.0
  • external: 8.0.0 (installed 8.0.0)
  • files_external: 1.25.1
  • richdocuments: 10.1.2 (installed 10.1.2)
  • santacloud: 1.1.1 (installed 1.1.1)
  • side_menu: 5.3.0 (installed 5.3.0)
  • solitaire: 1.0.0 (installed 1.0.0)
  • spreed: 23.0.3 (installed 23.0.3)
  • suspicious_login: 11.0.0
  • tables: 2.0.1 (installed 2.0.1)
  • tasks: 0.17.1 (installed 0.17.1)
  • testing: 1.23.0
  • twofactor_nextcloud_notification: 7.0.0
  • twothousandandfortyeight: 1.0.2 (installed 1.0.2)
  • user_ldap: 1.24.0