Question kunena 1.6.2 to 1.6.3 upgrade: all users got banned

After an easy automated upgrade with your installation package i got this error.
All the users plus admin got banned and if i try to click on user manager banned user link to disable ban i got this error:

You do not have permissions to ban the administrator username.

username is a generic user that is not an administrator. I cannot change any other ban. what is the problem?

Database collation check: The collation of your table fields are correct

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Joomla default template details : rt_dominion_j15 | author: RocketTheme | version: 1.5.11 | creationdate: July 20, 2010

Kunena default template details : Aphotic | author: snilloconator | version: 1.6.0 | creationdate: 2010-23-09

Kunena version detailled: Installed version: 1.6.3 | Build: 4344 | Version name: Parlare | Kunena detailled configuration:

Warning: Spoiler!

[th]Kunena config settings:[/th]

board_title	4CATS Forum
board_offline	0
board_ofset	0
offline_message	<h2>The Forum is currently offline for maintenance.</h2> Check back soon!
enablerss	1
enablepdf	1
threads_per_page	20
messages_per_page	6
messages_per_page_search	15
showhistory	1
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template	Aphotic
showannouncement	1
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catimagepath	category_images/
showchildcaticon	1
annmodid	62
rtewidth	450
rteheight	300
enableforumjump	1
reportmsg	1
username	1
askemail	0
showemail	0
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showkarma	1
useredit	1
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editmarkup	1
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regonly	0
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pubwrite	0
floodprotection	0
mailmod	0
mailadmin	0
captcha	0
mailfull	1
allowavatar	1
allowavatarupload	1
allowavatargallery	1
avatarquality	65
avatarsize	2048
allowimageupload	0
allowimageregupload	1
imageheight	800
imagewidth	800
imagesize	150
allowfileupload	0
allowfileregupload	1
filetypes	txt,rtf,pdf,zip,tar.gz,tgz,tar.bz2
filesize	120
showranking	1
rankimages	1
avatar_src
fb_profile
pm_component
userlist_rows	30
userlist_online	1
userlist_avatar	1
userlist_name	1
userlist_username	1
userlist_posts	1
userlist_karma	1
userlist_email	0
userlist_usertype	0
userlist_joindate	1
userlist_lastvisitdate	1
userlist_userhits	1
latestcategory	0
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rss_excluded_categories
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rss_cache	900
fbdefaultpage	recent
default_sort	asc
alphauserpointsnumchars	0
sef	0
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sefutf8	0
showimgforguest	1
showfileforguest	1
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polltimebtvotes	00:15:00
pollnbvotesbyuser	100
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ordering_system	mesid
post_dateformat	ago
post_dateformat_hover	datetime
hide_ip	1
js_actstr_integration	0
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	50
thumbheight	32
thumbwidth	32
hideuserprofileinfo	put_empty
integration_access	joomla
integration_login	joomla
integration_avatar	kunena
integration_profile	kunena
integration_private	uddeim
integration_activity	communitybuilder
boxghostmessage	0
userdeletetmessage	0
latestcategory_in	1
topicicons	1
onlineusers	1
debug	0
catsautosubscribed	0
showbannedreason	0
version_check	1
showthankyou	1
showpopthankyoustats	1
popthankscount	5
mod_see_deleted	0
bbcode_img_secure	text
listcat_show_moderators	1
lightbox	1
activity_limit	0
show_list_time	720
show_session_type	0
show_session_starttime	0
userlist_allowed	0

Third-party components: AlphaUserPoints: Disabled or not installed | CommunityBuilder: Installed (Version : 1.3.1) | Jomsocial: Disabled or not installed | UddeIm: Installed (Version : 2.2)

Third-party SEF components: sh404sef: Disabled or not installed | ARTIO JoomSEF: Disabled or not installed | AceSEF: Disabled or not installed

Plugins: System - Mootools12: Disabled | System - Mootools Upgrade: Enabled | JFirePHP: Disabled or not installed | Kunena Discuss: Disabled or not installed | Kunena Search: Disabled or not installed | My Kunena Forum Menu: Disabled or not installed | My Kunena Forum Posts: Disabled or not installed

Modules: Kunena Latest: Disabled or not installed | Kunena Stats: Disabled or not installed | Kunena Login: Disabled or not installed

i found an error in the database, i dont know but it came up with the update.
All the registered members (all the users) got all zeros in the field banned in kunena_users table. I had to change it to NULL for every users to unban them.