How to fix the filters' behaviour?

Hi guys, I need your help. I have a request URL to REST API

questions?populate[user_answers][populate][0]=users_permissions_user&filters[$and][0][category][id][$eq]=21&filters[$and][1][user_answers][users_permissions_user][id][$ne]=2&pagination[page]=1

Generally, it works, but I have a question about the filters. They work separately, but if I put them together, the second filter does not work. How can I fix it?