Hi,
I have a local system and I have around 5000 clients on it. When I export the clients from my local system on excel file and then I import it to odoo, odoo creates an external id for them.
Lets' say later on I have updated the clients phone number and created a new 500 client on my local system so the total are 5500 and I exported them on excel file then I imported the new excel file on odoo. It will create a new external id for all contacts since the excel file which generated from the local system didn't have the external id from odoo.
What should I do ? Is there a way that I can change the main parameter on uploading from external id to email or Misc reference or anything that could be static on my local system for example ? So I can avoid any duplicating that could happen ?
BTW, I need to work on the both systems the local system and odoo for some reasons.
Thank you.