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 ('d616ee595c100051a3d809273f5560cc', -1, 1713960510, 1713960510, '12bff0f3', 3, 0, 0)

Line : 187
File : sessions.php