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 ('7f83668540b07cf8fd2f4175cd2cd4cb', -1, 1495770259, 1495770259, '36a2a8bb', -1, 0, 0)

Line : 187
File : sessions.php