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 ('b3034e5ad7f7883a25a9abee0e9760a4', -1, 1713255515, 1713255515, '12ddbb79', 5, 0, 0)

Line : 187
File : sessions.php