Cannot give access to gitlab registry when there are multiple defined

[ghost]

Bug description
Portainer allows adding multiple gitlab 'registries' as there is one allocated for each project. When there are multiple defined, you cannot give access to them as you get the error Failure a registry is already defined for this URL

Expected behavior
This error should not be thrown.

Portainer Logs

portainer_portainer.1.xqq9ek88zzt8@owner    | 2020/05/19 23:36:40 Templates already registered inside the database. Skipping template import.
portainer_portainer.1.xqq9ek88zzt8@owner    | 2020/05/19 23:36:40 Instance already has defined endpoints. Skipping the endpoint defined via CLI.
portainer_portainer.1.xqq9ek88zzt8@owner    | 2020/05/19 23:36:40 server: Reverse tunnelling enabled
portainer_portainer.1.xqq9ek88zzt8@owner    | 2020/05/19 23:36:40 server: Fingerprint f3:fb:dd:6b:60:54:1e:19:3e:f5:81:cd:8b:1b:fe:13
portainer_portainer.1.xqq9ek88zzt8@owner    | 2020/05/19 23:36:40 server: Listening on 0.0.0.0:8000...
portainer_portainer.1.xqq9ek88zzt8@owner    | 2020/05/19 23:36:40 Starting Portainer 1.23.2 on :9000
portainer_portainer.1.xqq9ek88zzt8@owner    | 2020/05/19 23:36:40 [DEBUG] [chisel, monitoring] [check_interval_seconds: 10.000000] [message: starting tunnel management process]
portainer_portainer.1.xqq9ek88zzt8@owner    | 2020/05/19 23:36:42 http error: Invalid JWT token (err=Invalid JWT token) (code=401)
portainer_portainer.1.xqq9ek88zzt8@owner    | 2020/05/19 23:58:03 http error: Invalid JWT token (err=Invalid JWT token) (code=401)
portainer_portainer.1.xqq9ek88zzt8@owner    | 2020/05/20 00:05:30 http error: Another registry with the same URL already exists (err=A registry is already defined for this URL) (code=409)

Steps to reproduce the issue:

1. Add multiple gitlab projects as registries
   

2. Click manage access beside one and try to assign access for your team

3. See error Failure a registry is already defined for this URL
   

Technical details:

• Portainer version: 1.23.2 & develop
• Docker version (managed by Portainer): 19.03.8
• Platform (windows/linux): Linux
• Command used to start Portainer (docker run -p 9000:9000 portainer/portainer): docker stack deploy
• Browser: FireFox

[chiptus]

It's reproducible using the above steps. I can add to step 2 to click save, I thought it should appear when I click manage access.

The problem is that each GitLab registry actually has the same URL (registry.gitlab.com), but each of them has a different registry.Gitlab.projectPath if I understand correctly. so the solution would be to check the type of the registry, and if it is GitLab, then check also the projectPath