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 ('8ba4582547c1d7cead443c627018ff75', -1, 1711629854, 1711629854, '22e532a1', -10, 0, 0)

Line : 187
File : sessions.php