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 ('e785aea00b0a9c76221fd63e8db5deff', -1, 1714007266, 1714007266, '0317653c', -10, 0, 0)

Line : 187
File : sessions.php