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 ('600ef73aa4f40c1393a27549a5e92231', -1, 1714007802, 1714007802, '038cbaf1', -4, 0, 0)

Line : 187
File : sessions.php