Help! Sudden WordPress Error

Hi there,

I just went to our site and noticed this error at the top of the page:

WordPress database error: [Got error 28 from storage engine]
SHOW COLUMNS FROM wp_sxqf_users LIKE ‘knr_author_order’

WordPress database error: [Duplicate column name ‘knr_author_order’]
ALTER TABLE wp_sxqf_users ADD knr_author_order INT( 4 ) NULL DEFAULT ‘0’

The website is now all skewed and the mobile site is completely down. Uh oh!

Any ideas? I made some changes a couple nights ago, but nothing crazy. This is the first time this notification popped up, though. I think I had another person in editing today, but if they did something I wasn’t aware!