Hello,

I am using odoo.sh platform mainly with the native package (inventory/MRP/Barecode..)
there is few things I would like to modifiy in the native package like making a column unique.
One exemple would be to have the intern reference from the inventory module unique whitout being able to import/create duplicate.

My questions are the following : 

Generally speaking, what is the best way to slightly modify these native modules? 
I understood that the odoo will be kept updated so if I modify something it may be broken later on... (and I have only basic knowledge for developing modules)

is odoo studio a good solutions to apply modifications ?

what are the consequences if I do modification directly in the scripts (.py) ?


Thank you in advance, 
Hope it's clear enough,

Regards,