Not really sure. I can't remember what each value in the array is for but if you are going to try to repair the board and not re-install. Here is what I would do.
Add a forum in the control panel. Make the settings for what you would have for the existing ones.
Make a test post. If it works double check the new forum in the var file against the others.
Then just disable the test forum from view.
Should take a whole 5 minutes to do and this should at least verify something is working at all.
NOTE:Old school teaching from classic was always never delete a forum just disable it. And recycle for a future forum.