phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './kidnem998/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 ('6fe4bbf98ac220c2a0bfbda1fc8c786f', -1, 1474996248, 1474996248, '36f2e0fa', -1, 0, 0)

Line : 187
File : sessions.php