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 ('8bfdce59ab83837d591cc2c390fce04c', -1, 1713536455, 1713536455, '12743e2d', 6, 0, 0)

Line : 187
File : sessions.php