phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './vrforum/phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('68dfdcdb9f6128c7d20aa9691d03c4da', -1, 1398028029, 1398028029, '36ea3c85', 0, 0, 0)

Line : 187
File : sessions.php