The documentation about restoring from backup says that "JIRA versions do not match", but they have instructions on what to do which basically say to set up a test JIRA instance identical to your target instance, try to back up on it, and if it works, then use a backup from the test instance to pass it to your actual target instance which will be the same version.
You can read more here:
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Hi Atlassian Community! My name is Shana, and I’m on the Jira Software team. One of the many reasons this Community exists is to connect you to others on similar product journeys or with comparabl...
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