Upgrading a single container not working properly

#1

Rancher Version: v1.6.25
Docker Version: 18.06.3-ce

Reference Link: https://rancher.com/docs/rancher/v1.6/en/upgrading/#upgrading-a-single-container-non-ha---bind-mounted-mysql-volume

I have tried the above-mentioned link for upgrading rancher container but its not working properly.

Error: s6-svscanctl: fatal: unable to control /service: supervisor not listening

I have created even MySQL user and gave the UID/GID to the folder path on the host. It still not working. Any suggestions??