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 ('70cc0508fa6627ee21ca51c3e6ca743e', -1, 1419272738, 1419272738, '3691d150', -1, 0, 0)

Line : 187
File : sessions.php