HTTPS issue with my site

Hi,
I have a multisite few few sub domain site. Few days ago I’ve installed SSL on the main site url i.e http://www.isaumya.com. Everything is working fine. But when I try upgrade my network, it is throwing me a waring issue that it cannot upgrade my other site i.e https://photography.isaumya.com due to ssl issue. I dont have SSL installed for that subdomain nor any redirect set for that subdomain so that it will do this kind of thing. I read on the internet that it happens with the DOmain mapping plugin which I’m using. So, please help me.

How can I stop my other sites trying to use https? I want them to use http like they normally do.

Please help.

Screenshot: https://www.diigo.com/item/image/3um1h/bwd1

https://wordpress.org/plugins/wordpress-mu-domain-mapping/