Change Portainer Engine Root Directory

[koshMer]

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Hi,

unfortunately I have two versions of portainer installed on Ubuntu. One via snap, the other via apt. Currently, the local environment in portainer has the environment url unix:///var/run/docker.sock but the engine root directory is set to /var/snap/docker/common/var-lib-docker.

Recently, after physically moving and rebooting the host system various times, I get a permission error to mount volumes in /opt/... which I attribute to the snap version of docker. Why this only happens now, but all volumes are saved in the directory of the apt version, I have no idea.

My question: Is there a way to change the engine root directory? If not, how do i safely, without losing data, migrate (i.e. delete and create?) the existing portainer container and stacks? How does it know in which directory to look for docker to begin with?

I am happy to provide any details you might need to help but wasn't sure where to start.