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 ('9ea0a369388ba35d8245fb937a7af8bc', -1, 1713575703, 1713575703, '0395fe23', -4, 0, 0)

Line : 187
File : sessions.php