Wait, you have them both installed in one database or seperate databases? If theyre in the same db and you havent already entered seperate prefixes then theyre running from the same tables..
Otherwise, export the data and.. i suppose you could just open it in some form of editor, and do a find and replace (i.e. find “phpvms_” replace with “phpvms2_”)
You’ll have to export the database, in the export file, change all the table prefixes (you’ll see phpvms_, change to phpvmsdev_ or something), and then in local.config.php, point it to the right database, and change the TABLE_PREFIX parameter there