Write permission not working with sharing

[headstorm21]

Steps to reproduce

1. Create a calendar
2. Share calendar with a specific user and give the write permission
3. create or modify event in share calendar by specific user

Expected behaviour

Actual behaviour

When i create and share calendar with a specific user and i give write permission on, there's 2 problems:

• the first is when i refresh the calendar web page and i check the write permission on the calendar that i share, the same specific user appear 2 times, the first have the write right and the second not (give the write permission for the second is impossible)
• the second is when the specific user try to add or modify something in the share calendar, he can't

i need this share function and i don't understand why it doesn't work.

Thanks for your help.

Server configuration

Operating system:
Debian stretch

Web server:
Apache 2.4
Database:
Mariadb
PHP version:
7.0
ownCloud version: (see your admin page)
10.0.1
Calendar version: (see the apps page)
1.5.4
Updated from an older installed version or fresh install:
Fresh Install

[bwiese71]

Exactly same issue for me too on 10.0.3.3 fresh install.

[gabinita]

Same Issue on 10.0.3.3. Can share , allow edit, but the shared person cannot edit. Please advise

[gabinita]

I tried different forms, seams the if you share your calendar with a group and give edit right is working, is not working if you share with a user and give edit right is not working.

[DeepDiver1975]

please test this fix - #839 THX

[localguru]

Same problem with 9.1.7 with calender 1.5.4, PR #839 doesn't fix it.