phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './db_lets5/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 ('292fb13c41ee7a1fefb65c363afc5b8e', -1, 1438287181, 1438287181, '36912c86', 2, 0, 0)

Line : 220
File : sessions.php