This is a fairly common problem to find after an upgrade to Jira. Some older versions of Jira were not checking for this. In some cases you might never notice a problem when running similar collations. However, since Atlassian is not testing every possible collation, it is probably best to correct this by creating a new database with the correct collation (as listed in the documentation) and then importing your existing data into that instance.
Steps on how I would recommend doing that are as follows:
By following these steps you can then import your previous data into a supported database with the correct database setup.
I would recommend avoiding trying to change the collation on an existing database, in theory it is possible, but I have found it can be difficult to do correctly, and this method is usually more successful.
Remember that time you realized it was possible to refresh your Jira data in Google sheets with just one click? What if we told you that you can now get the latest data with no clicks at all?! Zero! ...
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