Calendar of contact's birthdays are not editable after re-sync

[mixim-mixim]

Steps to reproduce

1. Delete calendar of birthdays
2. Reactivate/Create new by executing
   sudo -u [www-data] php occ dav:sync-birthday-calendar [user-name]
3. The calendar is present but not editable (no color chooser)

Expected behaviour

The calendar should be editable (color chooser is present)

Actual behaviour

The calendar is present but not editable (no color chooser)

Server configuration

Operating system: Ubuntu 16.04

Web server: Apache

Database: Mysql

PHP version: 7.x

Nextcloud version: 13.0.2

Login as admin user into your Nextcloud and access 
http://example.com/index.php/settings/integrity/failed 
paste the results here.
No errors have been found.
</details>

**List of activated apps:**
<details>
<summary>App list</summary>

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your Nextcloud installation folder

Enabled:
  - activity: 2.6.1
  - audioplayer: 2.2.5
  - calendar: 1.6.1
  - comments: 1.3.0
  - contacts: 2.1.3
  - dav: 1.4.6
  - federatedfilesharing: 1.3.1
  - federation: 1.3.0
  - files: 1.8.0
  - files_external: 1.4.1
  - files_pdfviewer: 1.2.1
  - files_sharing: 1.5.0
  - files_texteditor: 2.5.1
  - files_trashbin: 1.3.0
  - files_versions: 1.6.0
  - files_videoplayer: 1.2.0
  - firstrunwizard: 2.2.1
  - gallery: 18.0.0
  - logreader: 2.0.0
  - lookup_server_connector: 1.1.0
  - nextcloud_announcements: 1.2.0
  - notifications: 2.1.2
  - oauth2: 1.1.0
  - password_policy: 1.3.0
  - provisioning_api: 1.3.0
  - rainloop: 5.0.6
  - serverinfo: 1.3.0
  - sharebymail: 1.3.0
  - survey_client: 1.1.0
  - systemtags: 1.3.0
  - theming: 1.4.1
  - theming_customcss: 1.0.0
  - twofactor_backupcodes: 1.2.3
  - unsplash: 1.1.1
  - updatenotification: 1.3.0
  - workflowengine: 1.3.0
Disabled:
  - admin_audit
  - apporder
  - dashboard
  - documents
  - encryption
  - keeweb
  - news
  - ownnote
  - twofactor_totp
  - user_external
  - user_ldap

</details>

**Nextcloud configuration:**
<details>
<summary>Config report</summary>

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud installation folder

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "13.0.2.1",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "default_language": "de",
        "defaultapp": "rainloop",
        "installed": true,
        "loglevel": 1,
        "theme": "",
        "forcessl": true,
        "apps_paths": [
            {
                "path": "\/var\/www\/vhosts\/fairsoft.koeln\/domains\/nextcloud.fairsoft.koeln\/html\/apps",
                "url": "\/apps",
                "writable": true
            }
        ],
        "appstoreenabled": true,
        "appstoreurl": "https:\/\/apps.nextcloud.com\/api\/v0",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "mail_smtpmode": "smtp",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtptimeout": 10,
        "mail_smtpauthtype": "LOGIN",
        "maintenance": false,
        "trusted_domains": [
            "nextcloud.fairsoft.koeln"
        ],
        "mail_smtpauth": 1,
        "xframe_restriction": false,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpsecure": "ssl",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "user_webdavauth_url": "https:\/\/nextcloud.fairsoft.koeln",
        "trashbin_retention_obligation": "auto",
        "appstore.experimental.enabled": true,
        "updater.release.channel": "stable",
        "overwrite.cli.url": "https:\/\/nextcloud.fairsoft.koeln",
        "mail_smtpport": "465",
        "updater.secret": "***REMOVED SENSITIVE VALUE***"
    }
}

</details>

**Are you using external storage, if yes which one:** 

**Are you using encryption:** no

**Are you using an external user-backend, if yes which one:**

#### LDAP configuration (delete this part if not used)
<details>
<summary>LDAP config</summary>

With access to your command line run e.g.:
sudo -u www-data php occ ldap:show-config
from within your Nextcloud installation folder

Without access to your command line download the data/owncloud.db to your local
computer or access your SQL server remotely and run the select query:
SELECT * FROM oc_appconfig WHERE appid = 'user_ldap';

Eventually replace sensitive data as the name/IP-address of your LDAP server or groups.

</details>

### Client configuration
**Browser:**

**Operating system:**

### Logs
#### Web server error log
<details>
<summary>Web server error log</summary>

Insert your webserver log here

</details>

#### Nextcloud log (data/nextcloud.log)
<details>
<summary>Nextcloud log</summary>

Insert your Nextcloud log here

</details>

#### Browser log
<details>
<summary>Browser log</summary>

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log
c) ...

</details>

[UtechtDustin]

This is the wrong repository i think --> https://github.com/nextcloud/calendar

[mixim-mixim]

moved to Claendar issue list