Why is an unknown account 'YA' appearing when I try to login?

In these few days, when I try to login to my shopify shop, there is an unknown login account “YA” appear:

Could you help to verify why there’s YA to manage & switch account? YA is not my shop’s account.

Clear your browser cache and cookies @blmshop

Tks so much for your advise. However, the cache clearing seems not workable.

The YA is still appearing…

It is saved by browser cookies, you just need to clear it, it will work fine. Refer https://support.microsoft.com/en-us/microsoft-edge/delete-cookies-in-microsoft-edge-63947406-40ac-c3b8-57b9-2a946a29ae09
Or simply, you can use another browser to access.
Hope it helps!

Did you clear cookies @blmshop