phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './bdforum/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 ('7b0015f85994f55e72c0e428f9c9cd02', -1, 1481046555, 1481046555, '36928d3c', 0, 0, 0)

Line : 187
File : sessions.php