Hi, could you do me a favor and format your messages according to Start Here/Read Me First - #3 by bricks next time? they are difficult to read at the moment.
Means the containers references in the compose file aren’t running anymore 
Means some other container is still referencing the volume 
Please check your running containers. There should be a misconfiguration in some kind. If you need help paste the output of docker container ps -a.
It is also possible to force the removal of the containers by using docker volume rm -f greenbone-community-edition_redis_socket_vol but not being able to remove the volume indicates some misconfiguration issue on your side.