phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpBB/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 ('862ec4239379c4f1630c410ce7a1f3e9', -1, 1469336811, 1469336811, '36e102b2', 29, 0, 0)

Line : 187
File : sessions.php