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 ('ecbecacd0a8532a503a483dbb20b5afc', -1, 1713571960, 1713571960, '12760992', -4, 0, 0)

Line : 187
File : sessions.php