It's not possible to delete a field 'nickname'

[BFallert]

It's not possible to delete a field 'nickname'

Some of my contacts have a nickname. Some of them are imports from an e-mail account, so in this field they have nonsense (such as repeating the name).
Yesterday I wanted to clean up my contacts and removed all nicknames without meaningful content.
Then I realized that the nickname field was not deleted at all. So I check it several times, but always the same result.

A workaround for me was to empty the field. A delete was not possible then.

A second workaround is when i delete the nickname at my smartphone in the contacts app.

To Reproduce
Steps to reproduce the behavior:

1. Start browser
2. open local nextcloud (https://XXXX/nextcloud/apps/contacts/
3. Add 'nickname' to a test contact
4. Click on 'delete-icon' behind the 'nickname' field
5. 'nickname' is deleted
6. Select a other contact
7. Back to your test contact
8. 'nickname' is there again

Expected behavior
'nickname" should be deleted from the database.

Actual behavior
'nickname' is not deleted in the database, but only from the current mask, after a renewed call the contact with the 'nickname' is the field again.

Server configuration

Operating system: Linux, Raspberry Pi

Web server: Apache

Database:
Art: mysql
Version: 10.1.37
Größe: 12,8 MB

PHP version: 7.0.33

Nextcloud version: 15.0.2

Contacts version: 3.0.1

Updated from an older Nextcloud or fresh install: Updated from older Version 13 then 14 then 15.0.1RC, now 15.0.2
Problem is in 15.0.1RC and 15.0.2

Signing status:
http://example.com/index.php/settings/integrity/failed
No errors have been found.

List of activated apps:
sudo -u www-data php occ app:list
Enabled:

• accessibility: 1.1.0
• activity: 2.8.2
• bruteforcesettings: 1.3.0
• calendar: 1.6.4
• cloud_federation_api: 0.1.0
• comments: 1.5.0
• contacts: 3.0.1
• dav: 1.8.1
• dropit: 0.1.3
• federatedfilesharing: 1.5.0
• federation: 1.5.0
• files: 1.10.0
• files_external: 1.6.0
• files_markdown: 2.0.5
• files_mindmap: 0.0.11
• files_pdfviewer: 1.4.0
• files_sharing: 1.7.0
• files_texteditor: 2.7.0
• files_trashbin: 1.5.0
• files_versions: 1.8.0
• files_videoplayer: 1.4.0
• firstrunwizard: 2.4.0
• gallery: 18.2.0
• groupfolders: 2.0.2
• logreader: 2.0.0
• lookup_server_connector: 1.3.0
• nextcloud_announcements: 1.4.0
• notes: 2.5.1
• notifications: 2.3.0
• oauth2: 1.3.0
• password_policy: 1.5.0
• provisioning_api: 1.5.0
• serverinfo: 1.5.0
• sharebymail: 1.5.0
• support: 1.0.0
• survey_client: 1.3.0
• systemtags: 1.5.0
• tasks: 0.9.8
• theming: 1.6.0
• twofactor_backupcodes: 1.4.1
• updatenotification: 1.5.0
• workflowengine: 1.5.0
  Disabled:
• admin_audit
• dashboard
• encryption
• external
• ocsms
• quota_warning
• user_external
• user_ldap

Nextcloud configuration:
root@raspberrypi:/var/www/html/nextcloud# sudo -u www-data php occ config:list system
{
"system": {
"instanceid": "REMOVED SENSITIVE VALUE",
"passwordsalt": "REMOVED SENSITIVE VALUE",
"secret": "REMOVED SENSITIVE VALUE",
"trusted_domains": [
"192.168.1.40",
"berndsandhausen.feste-ip.net"
],
"datadirectory": "REMOVED SENSITIVE VALUE",
"overwrite.cli.url": "https://berndsandhausen.feste-ip.net/nextcloud",
"htaccess.RewriteBase": "/nextcloud",
"dbtype": "mysql",
"version": "15.0.2.0",
"dbname": "REMOVED SENSITIVE VALUE",
"dbhost": "REMOVED SENSITIVE VALUE",
"dbport": "",
"dbtableprefix": "oc_",
"dbuser": "REMOVED SENSITIVE VALUE",
"dbpassword": "REMOVED SENSITIVE VALUE",
"installed": true,
"log_type": "file",
"logtimezone": "Europe/Berlin",
"logfile": "/var/log/nextcloud.log",
"loglevel": 2,
"maintenance": false,
"theme": "",
"mail_from_address": "REMOVED SENSITIVE VALUE",
"mail_smtpmode": "sendmail",
"mail_smtpauthtype": "LOGIN",
"mail_domain": "REMOVED SENSITIVE VALUE",
"mail_smtpauth": 1,
"updater.release.channel": "stable",
"updater.secret": "REMOVED SENSITIVE VALUE"
}
}

Client configuration

Browser: Chrome, Firefox

Operating system: Windows10, Linux, Windows7

CardDAV-clients:
Error is only in Web-Version

[nextcloud-bot]

GitMate.io thinks possibly related issues are #835 (please delete.. ), #247 (It's not possible to modify the name), #612 (Delete property), #302 (Missing Fields), and #857 (deleting input field does not delete in vcf).

[skjnldsv]

Duplicate of #857