I had the same problem, my solution:
On xiaomi account you have to delete all the old phones you had.
Do this and the problem dissapears.
Settings//Mi Account//Devices//select and delete.
Probably you have the same phone two times.
That links worked for me, I used that and my device works fine ;)
Ive recovered the link of Xiaomi.eu on XDA forum:
https://forum.xda-developers.com/t/rom-miui-surya-xiaomi-eu-rom-for-poco-x3-nfc.4165247/
And the TWRP from mauronfrio...