@rmehta
I was not able to install the an app in newly installed erpnext which show the latest versions of frappe and erpnext.

Then I use the the command below
./env/bin/pip install my-app
and it installed successfully then on migration command it migrates the erpnext and frappe but not my-app
Now after restoring the database when i try to migrate, update .etc it gives a strange error.
Could not found app "None"
Here are are screen shotes of my console:
