I tried to make a new jira server use an existing database by adding the database settings to dbconfig.xml, I didn't know there is a specific process to follow in this case.
It didn't work so I stopped jira and renamed the dbconfig.xml to dbConfig-old.xml in the old jira server to remove the link between it and the database but that didn't help
Now I am trying to get the old jira server to start again but it is like a new installed one, it doesn't recognize the database configuration file