[openstack-helm] openstack-helm-images release stable/ussuri loci images building issue

Hello, I am trying to build a *loci openstack-helm-images release stable/ussuri *but there is an issue with each image I am building which could be related to the python version and pip package but I am really not sure about it. I also tried to update the python version for each package in requirements repo but it didn't help. Is there any way to upgrade the python version and pip as well in requirements? or does anybody know how to resolve this issue while building openstack-helm-images? I have attached logs for your ready reference. Help will be much appreciated thanks :) -- Thanks and Regards, Hemant Sonawane