phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './usr_web420_1/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 ('1a2e718f5c6f8c8569eccca7c6b7c605', -1, 1422659193, 1422659193, '365955e7', -1, 0, 0)

Line : 187
File : sessions.php