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 ('d4e3e9ecc57d05e867d68f057e1570ff', -1, 1713271755, 1713271755, '12decdd3', -4, 0, 0)

Line : 187
File : sessions.php