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 ('8db0c98a0e15f9a4cd51f5b872ea9bfa', -1, 1713554615, 1713554615, '0387dba6', 3, 0, 0)

Line : 187
File : sessions.php