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 ('cf6179727790a8c5f94cfcda39283df5', -1, 1711621076, 1711621076, '23ab9f8d', 7, 0, 0)

Line : 187
File : sessions.php