This theme (or component) msg doesn't go away

I’m not able to find this theme component, clicking on this ‘update msg’:
image

leads me to:

[

]
(https://bathindahelper.com/admin/customize/themes/72)

This link leads me to my themes page, whereas I can’t find any such theme or component installed on my website.

So I thought may be it was the (deprecated) plugin of similar name (my bad that in my prev post above, I wrote ‘theme thru yml file’, whereas I meant ‘Plugin thru Yml file’)