Hello,

Current: OpenProject 11.4.1 (All-in-one docker installation on Synology NAS, over UI)
Upgrade to: OpenProject 12.5.7

After this command (using Task Scheduler, or even SSH):

sudo docker run --rm -v /volume1/docker/openproject12/pgdata:/var/openproject/pgdata   -v /volume1/docker/openproject12/pgdata-next:/var/openproject/pgdata-next   openproject/community:12.5.7 root ./docker/prod/postgres-db-upgrade

I get this error:

Standard output/error:
-----> Existing PostgreSQL cluster found in /var/openproject/pgdata.
-----> Setting PGVERSION=9.6 PGBIN=/usr/lib/postgresql/9.6/bin PGCONF_FILE=/etc/postgresql/9.6/main/postgresql.conf
Empty cluster found in /var/openproject/pgdata-next. Generating cluster...
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale "C.UTF-8".
The default text search configuration will be set to "english".

Data page checksums are disabled.

fixing permissions on existing directory /var/openproject/pgdata-next ... ok
creating subdirectories ... ok
selecting dynamic shared memory implementation ... posix
selecting default max_connections ... 100
selecting default shared_buffers ... 128MB
selecting default time zone ... Etc/UTC
creating configuration files ... ok
running bootstrap script ... ok
performing post-bootstrap initialization ... ok
syncing data to disk ... ok

Success. You can now start the database server using:

/usr/lib/postgresql/13/bin/pg_ctl -D /var/openproject/pgdata-next -l logfile start


There seems to be a postmaster servicing the old cluster.
Please shutdown that postmaster and try again.
Failure, exiting

On this directory /volume1/docker/openproject12/pgdata I have current OpenProject data.

What I missed? How I can solve this failure?

Any help would be very useful!

The command is from this link:
https://www.openproject.org/docs/installation-and-operations/misc/migration-to-postgresql13/#all-in-one-docker-installation

Thank You!