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 ('ebb3d06f4f0884bacc13c7b981ac875f', -1, 1454904549, 1454904549, '369072b1', 2, 0, 0)

Line : 187
File : sessions.php