Hi,

I try to upgrade an OpenProject 7.3.2 which runs with Docker.

I've seen that PostgreSQL needs to be upgraded from 9.4 to 9.6 and tried to follow this topic : https://gist.github.com/dmitrykustov/27c673ec4f7abd716912e4c830910019

But after running "sudo pg_upgradecluster 9.4 main" the "pg_lsclusters" command still show both versions Online and "sudo pg_dropcluster 9.4 main" doesn't work even if I add "--stop" (I get an error "Device or resource busy").

Does anybody know how to solve this issue ?

Regards