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 ('9a1f3c0e8f6b6db6fb0f6f39be2bfca3', -1, 1480926913, 1480926913, '369ea789', -1, 0, 0)

Line : 187
File : sessions.php