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 ('cc53a16bc8ee1c38e859957cac960abf', -1, 1713899889, 1713899889, '0d3becdb', 4, 0, 0)

Line : 187
File : sessions.php