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 ('19f49ecc07e3b0e3c23e21b7bcd6d510', -1, 1713486460, 1713486460, '12df6b7c', 5, 0, 0)

Line : 187
File : sessions.php