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 ('18ddc228d1e4b53fb5afff9934c4d378', -1, 1713482816, 1713482816, '12d93c23', 0, 0, 0)

Line : 187
File : sessions.php