phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('76423f8eabc41537346a2d9769d9bcac', -1, 1713969816, 1713969816, '12de7dab', -10, 0, 0)

Line : 187
File : sessions.php