Remove project impossible with 12.3.2, project created with 11.6.0

Summary

It is not possible to remove a project in Gitlab-ce 12.3.2. It is possible with the version 11.6.0. (tested with an old server) The data in Gitlab 12.3.2 was imported from the Gitlab 11.6.0 via an update 11.11.

If I create a new project from Gitlab 12.3.2, I can remove it without error.

Steps to reproduce

When I select and validate the remove projet (created in an old version), I have the error 500 page.

Example Project

(If possible, please create an example project here on GitLab.com that exhibits the problematic behavior, and link to it here in the bug report)

(If you are using an older version of GitLab, this will also determine whether the bug is fixed in a more recent version)

What is the current bug behavior?

I can't remove a project.

What is the expected correct behavior?

The project have to be deleted.

Relevant logs and/or screenshots

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:env:info)
System information
System:         Debian 10
Current User:   git
Using RVM:      no
Ruby Version:   2.6.3p62
Gem Version:    2.7.9
Bundler Version:1.17.3
Rake Version:   12.3.2
Redis Version:  3.2.12
Git Version:    2.22.0
Sidekiq Version:5.2.7
Go Version:     unknown
GitLab information
Version:        12.3.2
Revision:       d3cda7c1f96
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     PostgreSQL
DB Version:     10.9
URL:            http://servdev/gitlab
HTTP Clone URL: http://servdev/gitlab/some-group/some-project.git
SSH Clone URL:  git@servdev:some-group/some-project.git
Using LDAP:     no
Using Omniauth: yes
Omniauth Providers:
GitLab Shell
Version:        10.0.0
Repository storage paths:

• default: /var/opt/gitlab/git-data/repositories GitLab Shell path: /opt/gitlab/embedded/service/gitlab-shell Git: /opt/gitlab/embedded/bin/git

Results of GitLab application Check

Expand for output related to the GitLab application check

Checking GitLab subtasks ...
Checking GitLab Shell ...
GitLab Shell: ... GitLab Shell version >= 10.0.0 ? ... OK (10.0.0)
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Check GitLab API access: OK
Redis available via internal API: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Gitaly ...
Gitaly: ... default ... OK
Checking Gitaly ... Finished
Checking Sidekiq ...
Sidekiq: ... Running? ... yes
Number of Sidekiq processes ... 1
Checking Sidekiq ... Finished
Checking Incoming Email ...
Incoming Email: ... Reply by email is disabled in config/gitlab.yml
Checking Incoming Email ... Finished
Checking LDAP ...
LDAP: ... LDAP is disabled in config/gitlab.yml
Checking LDAP ... Finished
Checking GitLab App ...
Git configured correctly? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
Projects have namespace: ...
14/1 ... yes
13/2 ... yes
13/3 ... yes
15/4 ... yes
15/5 ... yes
15/6 ... yes
15/7 ... yes
15/8 ... yes
15/9 ... yes
15/10 ... yes
16/12 ... yes
17/13 ... yes
17/14 ... yes
18/15 ... yes
18/16 ... yes
18/17 ... yes
17/18 ... yes
19/19 ... yes
14/20 ... yes
14/21 ... yes
14/22 ... yes
22/23 ... yes
14/24 ... yes
14/25 ... yes
14/26 ... yes
22/27 ... yes
22/28 ... yes
22/29 ... yes
22/30 ... yes
22/31 ... yes
22/32 ... yes
18/33 ... yes
18/34 ... yes
18/35 ... yes
18/36 ... yes
18/37 ... yes
18/40 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.5.3 ? ... yes (2.6.3)
Git version >= 2.22.0 ? ... yes (2.22.0)
Git user has default SSH configuration? ... yes
Active users: ... 10
Is authorized keys file accessible? ... yes
Checking GitLab App ... Finished
Checking GitLab subtasks ... Finished

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)