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 ('5bfad7ad521af37213d3206cd3c777ba', -1, 1714024780, 1714024780, '12dbecc7', -4, 0, 0)

Line : 187
File : sessions.php