Why can I open first room in Xiaomi Redmi 4A?

Not long ago I buy xiaomi redmi 4 A and I make the second room,and I prefer to use the second room, and now I can open the first room, can you tell me how to fix this?

Hi stella. I'd love to help you but I'm sorry, can you tell me more about this room? Or are you pertaining to ROM? If you are pertaining to ROM, you can download compatible MIUI ROM for Xiaomi Redmi 4A here.

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