Jira software - How to deal with version to version releases

Question

I'm currently working on a project on Jira software where we just released version 1.1. We now want to start working on version 1.2 which will contain some new features and some improvements of already existing features. Most of features released in version 1.1 will remain unchanged and maintained in version 1.2.

The questions are the following:

• What are the good practices in Jira software to properly document issues that were released in one version and will be improved in the following version ? So far we tried to simply add the tag version 1.2 to the concerned issues and changed their status from "done" to "backlog", but this broke the version 1.1 reporting (warning that some issues from version 1.1 are not done yet).

• For the issues that will be maintained in the new version (without modification), is it enough to add the tag version 1.2 ? We also considered leaving those issues with only the tag version 1.1 and that all issues from version 1.1 will be implicitly part of version 1.2, but in that case, how do we document an issue from version 1.1 that we no longer wish to maintain in version 1.2 ?

Thanks in advance for your help !