[BUG] sync error for repetitive tasks

[wingnah]

Describe the bug

To Reproduce

in Davx5 bug report: Bad Request

Expected behavior

davx5-debug.zip

davx5-debug.zip

Screenshots

Device and version
-See full details in Davx5 report
Jtx Board

[patrickunterwegs]

Hi @wingnah , unfortunately the logs don't say anything but that the server responded with "Bad request". Is this the only entry with recurrence? Or is there anything you can do to make this error reproducible?

[wingnah]

Hi, It's the only entry I created with recurrence in jIxt recently. I have removed all of it, but the error does show perfect recurrence, dont know how to get rid of it. met vriendelijke groet, Wim Bollen Op wo 1 apr 2026, 00:51 schreef Patrick Lang ***@***.***>:

…

*patrickunterwegs* left a comment (TechbeeAT/jtxBoard#2229) <#2229 (comment)> Hi @wingnah <https://github.com/wingnah> , unfortunately the logs don't say anything but that the server responded with "Bad request". Is this the only entry with recurrence? Or is there anything you can do to make this error reproducible? — Reply to this email directly, view it on GitHub <#2229?email_source=notifications&email_token=BPGFYPW2ZC6XZFNJ6LTHUD34TRDWFA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTIMJWGYYTIMRWGI22M4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJLDGN5XXIZLSL5RWY2LDNM#issuecomment-4166142625>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BPGFYPUZPDI3LEFEAKNDRW34TRDWFAVCNFSM6AAAAACXDD7Q5WVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHM2DCNRWGE2DENRSGU> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[emanuelepns]

Hi, I'm getting a sync error for recurring tasks too.
I sync to Nextcloud using DAVx5, and when I set the first task to completed then it gives an HTTP 415 error.
The log on Nextcloud states:
Validation error in iCalendar: A calendar object on a CalDAV server may only have components with the same UID
The only way to get rid of it is deleting completely the series of tasks.
Any help is appreciated

[pedrom34]

Exact same issue. With recurring tasks, davx complains and the error message reads:

HTTP RESPONSE
<?xml version="1.0" encoding="utf-8"?>
<d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
  <s:sabredav-version>4.7.0</s:sabredav-version>
  <s:exception>Sabre\DAV\Exception\UnsupportedMediaType</s:exception>
  <s:message>Validation error in iCalendar: A calendar object on a CalDAV server may only have components with the same UID.</s:message>
</d:error>

[patrickunterwegs]

Hi, this seems to be a DAVx5 issue, please have a look here:
bitfireAT/davx5-ose#2190 (reply in thread)
It should be solved soon.