Deleted calendar from recurring event appears after editing instance

[KolbeinNL]

Steps to reproduce

1. Create event
2. Add time
3. Add recurring
4. Verify that the events are created
5. Remove instance
6. Change time or description
7. Verify that the removed instance reappeared

Expected behaviour

The removed instance should be removed permanently

Actual behaviour

The removed instance appeared again

Server configuration

ubuntu 18.04

Operating system:
ubuntu

Web server:
Apache

Database:
postgres

PHP version:

ownCloud version: (see your admin page)
10.0.10

Calendar version: (see the apps page)
1.6.0

The networklog

Added the relevant PUT request as HAR

Archive 19-02-03 19-58-36.zip

add a recurring event

delete instance

verify that the instance is deleted

change f.e. the subject

observe the deleted event reoccurred

Client configuration

Firefox

Operating system:

Ubuntu

CalDAV-clients:

The browser app

data/owncloud.log
sensitive information

webserverlog
sensitive information

[Julian1998]

Logs

Web server error log

Insert your webserver log here

Log file (data/owncloud.log)

Insert your ownCloud.log file here

Browser log

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

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

Please fill that gaps ;) It would help ous a lot!

[KolbeinNL]

Hello Julian,

I cannot add webserver logs as it contains sensitive information such as email addresses. I have added lots of screenshots as well as the output of curl.. Is this enough?

[Julian1998]

@KolbeinNL Hi, The screenshots are good to understand the process of what's happening. But normally I still need infos about any errors ;) But in this situation the ss should be enough!

I' m gonna reproduce this bug when I find some time.

[karakayasemi]

This issue may resolved with #964 . @KolbeinNL would you test this issue with master branch?

[karakayasemi]

This issue is resolved with #964. @KolbeinNL if you can reproduce this error with current master, do not hesitate to re-open this ticket.