phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './tripleac_Forum/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 ('5bc1975e1f6ed3ee4b23cabe00c1af5e', -1, 1462477976, 1462477976, '36571bdc', -1, 0, 0)

Line : 187
File : sessions.php