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 ('815df6aac2c6f1bd490a562b092cf14d', -1, 1714262702, 1714262702, '0a020003', -9, 0, 0)

Line : 187
File : sessions.php