apt upgrade to gitlab-ee 12.0.0-ee.0 failed

It seems that there is a problem with some localization, gitlab-ctl restart did fix the problem for now, as nginx and unicorn weren't coming up again. We updated from version 11.11.3

Chef Client finished, 76/879 resources updated in 01 minutes 20 seconds
gitlab Reconfigured!
Checking for an omnibus managed postgresql: OK
Checking for a newer version of PostgreSQL to install
Upgrading PostgreSQL to 10.7
Checking if we already upgraded: NOT OK
Checking if PostgreSQL bin files are symlinked to the expected location: OK
Toggling deploy page:cp /opt/gitlab/embedded/service/gitlab-rails/public/deploy.html /opt/gitlab/embedded/service/gitlab-rails/public/index.html
Toggling deploy page: OK
Toggling services:ok: down: alertmanager: 93s, normally up
ok: down: crond: 92s, normally up
ok: down: gitaly: 1s, normally up
ok: down: gitlab-monitor: 0s, normally up
ok: down: grafana: 0s, normally up
ok: down: logrotate: 93s, normally up
ok: down: node-exporter: 92s, normally up
ok: down: postgres-exporter: 92s, normally up
ok: down: prometheus: 91s, normally up
ok: down: redis-exporter: 91s, normally up
ok: down: registry: 90s, normally up
ok: down: sidekiq: 87s, normally up
Toggling services: OK
Stopping the database:ok: down: postgresql: 0s, normally up
Stopping the database: OK
Symlink correct version of binaries: OK
Creating temporary data directory: OK
Initializing the new database: OK
Upgrading the data:Error upgrading the data to version 10.7
STDOUT: Performing Consistency Checks
-----------------------------
Checking cluster versions                                   ok
Checking database user is the install user                  ok
Checking database connection settings                       ok
Checking for prepared transactions                          ok
Checking for reg* data types in user tables                 ok
Checking for contrib/isn with bigint-passing mismatch       ok
Checking for invalid "unknown" user columns                 ok
Creating dump of global objects                             ok
Creating dump of database schemas
  gitlabhq_production
  postgres
  template1
                                                            ok

lc_ctype values for database "postgres" do not match:  old "en_US.UTF-8", new "C.UTF-8"
Failure, exiting
STDERR: 
Upgrading the data: NOT OK
== Fatal error ==
Error upgrading the database
== Reverting ==
ok: down: postgresql: 5s, normally up
Symlink correct version of binaries: OK
ok: run: postgresql: (pid 6354) 0s
== Reverted ==
== Reverted to 9.6.11. Please check output for what went wrong ==
Toggling deploy page:rm -f /opt/gitlab/embedded/service/gitlab-rails/public/index.html
Toggling deploy page: OK
Toggling services:ok: run: alertmanager: (pid 6365) 0s
ok: run: crond: (pid 6384) 1s
ok: run: gitaly: (pid 6392) 0s
ok: run: gitlab-monitor: (pid 6415) 1s
ok: run: grafana: (pid 6436) 0s
ok: run: logrotate: (pid 6458) 0s
ok: run: node-exporter: (pid 6464) 1s
ok: run: postgres-exporter: (pid 6547) 0s
ok: run: prometheus: (pid 6556) 1s
ok: run: redis-exporter: (pid 6577) 0s
ok: run: registry: (pid 6584) 0s
ok: run: sidekiq: (pid 6597) 1s
Toggling services: OK
Ensuring PostgreSQL is updated: NOT OK
Error ensuring PostgreSQL is updated. Please check the logs
dpkg: error processing package gitlab-ee (--configure):
 installed gitlab-ee package post-installation script subprocess returned error exit status 1
E: Sub-process /usr/bin/dpkg returned an error code (1)