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 ('c3d634e25a7da496575cb45f5613df4b', -1, 1481156332, 1481156332, '36c55a5f', 14, 0, 0)

Line : 187
File : sessions.php