Hi!
We are currently on version 7.9.1. of Jira Software, that has an expired maintenance contract. We would like to move Jira to a new server and keep the same software version. We tried to install different Jira versions (7.9.1, 7.9.0) on new server using the same license, but the error message everytime is something like this:

The release date of the version 7.9.0 is 08-04-2018 and it’s before our maintenance has expired.

I found a very similar problem to ours here: https://community.atlassian.com/t5/Jira-questions/JIRA-License-transfer/qaq-p/18017
I think there shouldn’t be any complication at all with license migration to new instance of Jira Software 7.9.1 / 7.9.0.
Our Jira container runs on the OpenShift Container Platform cluster.