I start the installation from scratch:
# zammad-docker-compose_zammad-elasticsearch_1
# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
# docker image rm 93cd63370bda fb873e3c2a61 e4c9576cbbba 96a149ad0157 c4236d458daa c86da9a6f92a 9a203e1912df 4d8bbf1731ab cc994726847f f6f2296798e9 ec2009291176
# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
# git clone https://github.com/zammad/zammad-docker-compose.git
# cd zammad-docker-compose/
# docker-compose up
...
zammad-postgresql_1 | 2022-12-06 08:03:58.725 UTC [1] FATAL: database files are incompatible with server
zammad-postgresql_1 | 2022-12-06 08:03:58.725 UTC [1] DETAIL: The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 15.1.
zammad-docker-compose_zammad-postgresql_1 exited with code 1
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-backup_1 | waiting for railsserver to be ready...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-railsserver_1 | waiting for init container to finish install or update...
zammad-websocket_1 | waiting for init container to finish install or update...
zammad-nginx_1 | waiting for init container to finish install or update...
zammad-scheduler_1 | waiting for init container to finish install or update...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-railsserver_1 | waiting for init container to finish install or update...
zammad-websocket_1 | waiting for init container to finish install or update...
zammad-nginx_1 | waiting for init container to finish install or update...
zammad-scheduler_1 | waiting for init container to finish install or update...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-railsserver_1 | waiting for init container to finish install or update...
zammad-websocket_1 | waiting for init container to finish install or update...
zammad-nginx_1 | waiting for init container to finish install or update...
zammad-scheduler_1 | waiting for init container to finish install or update...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-railsserver_1 | waiting for init container to finish install or update...
zammad-websocket_1 | waiting for init container to finish install or update...
zammad-nginx_1 | waiting for init container to finish install or update...
zammad-scheduler_1 | waiting for init container to finish install or update...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-railsserver_1 | waiting for init container to finish install or update...
zammad-websocket_1 | waiting for init container to finish install or update...
zammad-nginx_1 | waiting for init container to finish install or update...
zammad-scheduler_1 | waiting for init container to finish install or update...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-railsserver_1 | waiting for init container to finish install or update...
zammad-websocket_1 | waiting for init container to finish install or update...
zammad-nginx_1 | waiting for init container to finish install or update...
zammad-scheduler_1 | waiting for init container to finish install or update...
zammad-postgresql_1 |
zammad-postgresql_1 | PostgreSQL Database directory appears to contain a database; Skipping initialization
zammad-postgresql_1 |
zammad-postgresql_1 | 2022-12-06 08:04:59.134 UTC [1] FATAL: database files are incompatible with server
zammad-postgresql_1 | 2022-12-06 08:04:59.134 UTC [1] DETAIL: The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 15.1.
zammad-docker-compose_zammad-postgresql_1 exited with code 1
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-backup_1 | waiting for railsserver to be ready...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-railsserver_1 | waiting for init container to finish install or update...
zammad-websocket_1 | waiting for init container to finish install or update...
zammad-nginx_1 | waiting for init container to finish install or update...
zammad-scheduler_1 | waiting for init container to finish install or update...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-railsserver_1 | waiting for init container to finish install or update...
zammad-websocket_1 | waiting for init container to finish install or update...
zammad-nginx_1 | waiting for init container to finish install or update...
zammad-scheduler_1 | waiting for init container to finish install or update...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
zammad-railsserver_1 | waiting for init container to finish install or update...
zammad-websocket_1 | waiting for init container to finish install or update...
zammad-nginx_1 | waiting for init container to finish install or update...
zammad-scheduler_1 | waiting for init container to finish install or update...
zammad-init_1 | zammad railsserver waiting for postgresql server to be ready...
...
There the infinite loop happens again.