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 ('88bc27e00c7ad2c64fdda1d63e8b132c', -1, 1713484458, 1713484458, '12e035ca', -10, 0, 0)

Line : 187
File : sessions.php