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 ('a605b4cb03de6f8d278286510fff0a3b', -1, 1713521767, 1713521767, '1276020f', -10, 0, 0)

Line : 187
File : sessions.php