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 ('528b042012bf7a43ac5a91d6c92db1a3', -1, 1714052084, 1714052084, '340f3ba3', 3, 0, 0)

Line : 187
File : sessions.php