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 ('31e3b6dc75f2f2c5bbf2312d5211f9ed', -1, 1730419684, 1730419684, '0390521a', -9, 0, 0)

Line : 195
File : sessions.php