Hi I want to migrate odoo 15 into odoo 16 as I have added odoomg.conf file in odoo 16 

addons_path=D:\Odoo development\server\odoo\addons,
D:\Odoo Developments\OpenUpgrade\openupgrade_scripts\scripts,
D:\Odoo Developments\OpenUpgrade
Note:
here OpenUpgrade branch is 16.0

and running configuration is 

-c odoomg.conf --database=abc --update all --stop-after-init --load=base,web,openupgrade_framework

here abc is my v15 database which I want to migrate and as I believe I followed many documentation to see whether I am missing something here or not and after verifying that everything is fine but still getting below error.

 table = openupgrade.get_model2table(model)

AttributeError: module 'openupgradelib.openupgrade' has no attribute 'get_model2table.

openupgradelib is installed as well.

so anyone help me out what could be reason/solution of that error.