1) in the view "base.view_model_form" there is a field <model_id invisible ="1"> which must not exists in a o2m
2) after removing this the form opens , but it is not possible to save the model with the new field
as almost all checks fail.
after removing these constraints the new field exists in the db
but there is more view to add the new field as it was possible in v6
I found only the html version of the view.
1) in the view "base.view_ model_form" there is a field <model_id invisible ="1"> which must not exists in a o2m
2) after removing this the form opens , but it is not possible to save the model with the new field
as almost all checks fail.
after removing these constraints the new field exists in the db
but there is more view to add the new field as it was possible in v6
I found only the html version of the view.