An error when syncing metadata between two Nextcloud servers

[Janovlk]

Hello,

I use the Vdirsyncer version 0.19.2. Python 3.12.3, Ubuntu 24.04LTS. I'm synchronizing two Nextcloud servers. Syncing data is always okay.
I tried to sync metadata. I choosed color only for test. The Vdirsyncer reads colors without problems:
debug: Key: color
debug: A: #00FB00FF
debug: B: #6ea68f
debug: S: #00FB00FF

But after that, there is an error:

Copying color to caldav_nextcloud_ocloud_de/personal
debug: ====================
debug: PROPPATCH https://´zzzzz.ocloud.de/remote.php/dav/calendars/zzzzz/personal/
debug: {'User-Agent': 'vdirsyncer/0.19.2', 'Content-Type': 'application/xml; charset=UTF-8'}
debug: b'\n \n \n \n <ns0:calendar-color xmlns:ns0="http://apple.com/ns/ical/">#6ea68f</ns0:calendar-color>\n \n \n \n '
debug: Sending request...
debug: 207
debug: <CIMultiDictProxy('Date': 'Thu, 29 Aug 2024 16:50:46 GMT', 'Server': 'Apache', 'Content-Security-Policy': "default-src 'none';", 'Expires': 'Thu, 19 Nov 1981 08:52:00 GMT', 'Cache-Control': 'no-store, no-cache, must-revalidate', 'Pragma': 'no-cache', 'Vary': 'Brief,Prefer', 'X-Request-Id': 'Fu0qP7LjGun3v4cWmFTp', 'X-Debug-Token': 'Fu0qP7LjGun3v4cWmFTp', 'Set-Cookie': 'oc_sessionPassphrase=v5wDOF03qOfLrn%2F%2BBYtvU8gZev5Yhr6ycYUGSS%2BfpoR7N284e2TZFDZlA%2BNe%2FloSlu4lBX948MQk9sSEyTZYt9h9R9k%2BvaapeEKlu8PFOzWBkeErSs%2BgsG1BuAwqwZiU; path=/; secure; HttpOnly; SameSite=Lax', 'Set-Cookie': '__Host-nc_sameSiteCookielax=true; path=/; httponly;secure; expires=Fri, 31-Dec-2100 23:59:59 GMT; SameSite=lax', 'Set-Cookie': '__Host-nc_sameSiteCookiestrict=true; path=/; httponly;secure; expires=Fri, 31-Dec-2100 23:59:59 GMT; SameSite=strict', 'Set-Cookie': 'ocm8ds1rl6wk=h1m6l7acib9gkucs7e2gr0esq0; path=/; secure; HttpOnly; SameSite=Lax', 'Set-Cookie': 'cookie_test=test; expires=Thu, 29-Aug-2024 17:50:47 GMT; Max-Age=3600', 'Strict-Transport-Security': 'max-age=15768000', 'Referrer-Policy': 'no-referrer', 'X-Content-Type-Options': 'nosniff', 'X-Frame-Options': 'SAMEORIGIN', 'X-Permitted-Cross-Domain-Policies': 'none', 'X-Robots-Tag': 'noindex, nofollow', 'X-XSS-Protection': '1; mode=block', 'Connection': 'close', 'Transfer-Encoding': 'chunked', 'Content-Type': 'application/xml; charset=utf-8')>
debug: <StreamReader 472 bytes eof>
debug: Found cached value for ['command', '/home/zzzzzz/VdirNextcloudUser.sh'].
debug: Found cached value for ['command', '/home/zzzzzz/VdirNextcloudPass.sh'].
debug: Found cached value for ['command', '/home/zzzzzz/VdirNextcloudUser.sh'].
debug: Found cached value for ['command', '/home/zzzzzz/VdirNextcloudPass.sh'].
Metasyncing carddav_nextcloud/Personal
error: Unknown error occurred for carddav_nextcloud/Personal:
error: Use -vdebug to see the full traceback.
debug: File "/root/.local/share/pipx/venvs/vdirsyncer/lib/python3.12/site-packages/vdirsyncer/cli/tasks.py", line 156, in metasync_collection
debug: await metasync(
debug: File "/root/.local/share/pipx/venvs/vdirsyncer/lib/python3.12/site-packages/vdirsyncer/metasync.py", line 50, in metasync
debug: a = await storage_a.get_meta(key)
debug: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
debug: File "/root/.local/share/pipx/venvs/vdirsyncer/lib/python3.12/site-packages/vdirsyncer/storage/dav.py", line 693, in get_meta
debug: raise exceptions.UnsupportedMetadataError

Here is my config file: (username is replaced with zzzz)

**[general]
status_path = "~/.vdirsyncer/status/"

[pair caldav_nextcloud]
a = "caldav_nextcloud_ocloud_de"
b = "caldav_nextcloud_nextcloud_org"
collections = ["from a"]
metadata = ["color"]
conflict_resolution = "a wins"

[storage caldav_nextcloud_nextcloud_org]
type = "caldav"
url = "https://zzzzzz.next-cloud.org/remote.php/dav/calendars/zzzzzz/personal/"
username.fetch = ["command", "/home/zzzzzz/VdirNextcloudUser.sh"]
password.fetch = ["command", "/home/zzzzzz/VdirNextcloudPass.sh"]

[storage caldav_nextcloud_ocloud_de]
type = "caldav"
url = "https://zzzzzz.ocloud.de/remote.php/dav/calendars/zzzzzz/personal/"
username.fetch = ["command", "/home/zzzzzz/VdirNextcloudUser.sh"]
password.fetch = ["command", "/home/zzzzzz/VdirNextcloudPass.sh"]

[pair carddav_nextcloud]
a = "carddav_nextcloud_ocloud_de"
b = "carddav_nextcloud_nextcloud_org"
#collections = ["from a"]
collections = [["Personal", "contacts", "personal"]]
metadata = ["color"]
conflict_resolution = "a wins"

[storage carddav_nextcloud_ocloud_de]
type = "carddav"
url = "https://zzzzzz.ocloud.de/remote.php/dav/addressbooks/users/zzzzzz/contacts/"
username.fetch = ["command", "/home/zzzzzz/VdirNextcloudUser.sh"]
password.fetch = ["command", "/home/zzzzzz/VdirNextcloudPass.sh"]

[storage carddav_nextcloud_nextcloud_org]
type = "carddav"
url = "https://zzzzzz.next-cloud.org/remote.php/dav/addressbooks/users/zzzzzz/personal/"
username.fetch = ["command", "/home/zzzzzz/VdirNextcloudUser.sh"]
password.fetch = ["command", "/home/zzzzzz/VdirNextcloudPass.sh"]

[pair caldav_tabdigital]
a = "caldav_nextcloud_ocloud_de"
b = "caldav_nextcloud_tabdigital"
collections = null
metadata = ["color", "displayname"]
conflict_resolution = "a wins"

[storage caldav_nextcloud_tabdigital]
type = "caldav"
url = "https://mia.nl.tab.digital/remote.php/dav/calendars/zzzzzz/personal/"
username.fetch = ["command", "/home/zzzzzz/VdirNextcloudUser.sh"]
password.fetch = ["command", "/home/zzzzzz/VdirNextcloudPass.sh"]

[pair carddav_tabdigital]
a = "carddav_nextcloud_ocloud_de"
b = "carddav_nextcloud_tabdigital"
collections = null
metadata = ["color"]
conflict_resolution = "a wins"

[storage carddav_nextcloud_tabdigital]
type = "carddav"
url = "https://mia.nl.tab.digital/remote.php/dav/addressbooks/users/zzzzzz/contacts/"
username.fetch = ["command", "/home/zzzzzz/VdirNextcloudUser.sh"]
password.fetch = ["command", "/home/zzzzzz/VdirNextcloudPass.sh"]**