phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './why9work_phpbb1/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) VALUES ('c2f2524c1a9a17723d72b8488c1c964d', -1, 1438258011, 1438258011, 'adf5364f', 4, 0)

Line : 158
File : sessions.php