I have seen the error you're running into and in each case it was due to a Postgres installation that is not supported in that version of JIRA. I would definitley switch to one of the supported versions of Postgres and you should be good to go.
If you get the same error once you've switched databases let us know and we'll go from there.
If you spend enough time as a Jira admin - whether you are managing a single, mid-sized instance, a large enterprise one or juggling multiple instances at once - you will eventually find yourself in ...
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