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 ('bdfa3703f9b19541126257d1b72cf998', -1, 1713470592, 1713470592, '12e0446d', -4, 0, 0)

Line : 187
File : sessions.php