phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b7a7e7db92616f4764854e42c50a8f24' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('b7a7e7db92616f4764854e42c50a8f24', -1, 1771101121, 1771101121, 'd849d87b', -9, 0)

Line : 180
File : /www/includes/sessions.php