2014-09-03, 02:35 AM
Did you rename the admin directory on the 1.8 download before uploading them to the server?
If /admin is your new administrator directory, there will be no harm in deleting the old one, although you may want to migrate any additional modules added by plugins that you may have installed in your MyBB 1.6 forum.
If /admin is your new administrator directory, there will be no harm in deleting the old one, although you may want to migrate any additional modules added by plugins that you may have installed in your MyBB 1.6 forum.