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 ('a99a7ec43d2ec09c3489640bd49502b3', -1, 1505982543, 1505982543, '36e103cf', -4, 0, 0)

Line : 187
File : sessions.php