error when trying to edit post

When I tried to edit my post today I got the following erro:

SQL/DB Error:
[You have an error in your SQL syntax near 'WHERE ID = 50 ' at line 12]
UPDATE wp_posts SET post_content = 'I have to work today and tomorrow. [...] ', post_excerpt = '', post_title = 'work, school, work', post_status = 'publish', comment_status = 'open', ping_status = 'open', post_password = '', post_name = 'work-school-work', to_ping = '', WHERE ID = 50
Warning: Cannot modify header information - headers already sent by (output started at /home/memento/public_html/wordpress/wp-includes/wp-db.php:102) in /home/memento/public_html/wordpress/wp-admin/post.php on line 372