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 ('6f3c6bb6cc3d33ea4f57f0fe31078d3e', -1, 1714024978, 1714024978, '039183ee', -4, 0, 0)

Line : 187
File : sessions.php