Hello! I'm trying to connect the subdomain ai.lp-chat.ru to my Railway project, but I'm getting confusing instructions.

When I enter ai.lp-chat.ru, Railway tells me to add a CNAME record with Name: @, which only makes sense if ai.lp-chat.ru is a separate DNS zone — but it's not. I'm managing DNS for lp-chat.ru, and I need to add a CNAME for the subdomain "ai".

However, this causes DNS issues like ai.ai.lp-chat.ru if followed directly.

When I try other subdomains like aii.lp-chat.ru, Railway shows the correct Name: aii.

Can you clarify what's going on with ai.lp-chat.ru and how to make it work properly?