Sorry for all the questions, but I'm trying to delete the sql volume as you suggested. I'm guessing it's the root_sqldata volume? Anyway. Stopping netmaker, netmaker-ui, coredns and mq, but

root@netmaker:~# docker volume rm root_sqldata
Error response from daemon: remove root_sqldata: volume is in use - [dab5b5fed342b093afebe39660f2dd063009371a5a94aea407f3b659b4f4c496]