Question phpBB3 > FireBoard > Kunena conversion problem - please help

So I'm at a point where I have my phpBB3 data migrated into the same database as Joomla. FireBoard is installed and working.

My problem is when I try to run the converter I get:

Importing data from phpBB
Connecting to Database... OK
Populating Categories...
Invalid query:
INSERT INTO `db372163238`.`jos_fb_categories` (id,parent,name,ordering,description,pub_access,pub_recurse,published,numPosts,numTopics,id_last_msg,time_last_msg) SELECT forum_id, parent_id, forum_name, left_id, forum_desc, 0, 0, 1, forum_posts, forum_topics, forum_last_post_id, forum_last_post_time FROM `db372163238`.`phpbb_forums`
Unknown column 'parent_id' in 'field list'

Someone suggested I check the jos_fb_categories table structure to see if there is a field parent_id. I checked and there isn't. I see id or parent but not parent_id. I tried renaming parent to parent_id (no clue if it was the right step but I figured I'll try), but it didn't help.

What do I do know? Please help as we lost our admin and I have to figure this out on my own. And I don't know much about these things .