I assume you mean database (db) backup when you say BD?
The bad news is that you have lost all your attachments. But everything else should be ok. To recover it:
You may have problems with external user directories if you've used any, but it's an essay question dealing with all the variations. There are going to be other problems with missing add-ons and so-on, but this method will give you a working baseline to restore most of everything from.
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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