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 ('dc6b6a14566799a614e0acf77e0ea840', -1, 1713248942, 1713248942, '12ddbb79', -7, 0, 0)

Line : 187
File : sessions.php