MySQL Error

Hello There is something wrong with my website. I get this error while Im trying to add a new category:

MySQL ERROR: Error Number: 1364 Description: Field ‘cat_order’ doesn’t have a default value Query: INSERT INTO `exp_categories` (`group_id`, `cat_name`, `cat_url_title`, `cat_description`, `cat_image`, `parent_id`, `site_id`) VALUES (‘6’, ‘sub421’, ‘sub421’, ”, ”, ‘12’, ‘1’)

and Im getting error while Im trying to publish new entry:

MySQL ERROR: Error Number: 1364 Description: Field ‘recent_comment_date’ doesn’t have a default value Query: INSERT INTO `exp_weblog_titles` (`entry_id`, `weblog_id`, `author_id`, `site_id`, `ip_address`, `title`, `url_title`, `entry_date`, `edit_date`, `versioning_enabled`, `year`, `month`, `day`, `expiration_date`, `comment_expiration_date`, `sticky`, `status`, `allow_comments`, `allow_trackbacks`, `forum_topic_id`, `dst_enabled`) VALUES (”, ‘17’, ‘1’, ‘1’, ‘213.94.220.9’, ‘asdad’, ‘asdad’, ‘1218632932’, ‘20080813150852’, ‘y’, ‘2008’, ‘08’, ‘13’, ‘0’, ‘0’, ‘n’, ‘open’, ‘y’, ‘n’, ‘0’, ‘y’)

I dont know wahts happend, as befor everything was working fine…please any suggestions?