Delete 2 root categories?

[Lucky]

Can I delete the 2 root categories? Or can I give them another (negative?) ID?

I need to import a .csv file that is exported by another software and it contains categories with IDs 1 and 2, which are already used by the 2 root categories. These IDs are also used in the products.csv so I can't skip those lines or give them another number because then I need to rename all products.category_id every time there's an export/import (every 24 hours).

So, can I delete the 2 root categories? Or can I give them another (negative?) ID?

Or how to make sure ID's 1 and 2 become available to imported categories?

Thanks for any quick help.

[Rolige]

You can't delete these categories. You can import your new categories without keep the original ID.

[Lucky]

If I import the new categories without keeping their original ID then my products with category_id 1 and 2 won't be in the right category anymore. And also all other products will shift 2 categories.

And I can't change the products.category_id before the import because they are exported from a third party software every 24 hours.

So how can I solve this?

Edited September 17, 2018 by Lucky (see edit history)

[electriz]

Hi,
I would recommend to change those ID's number from 1 and 2 (in the source where it comes from) or modify the importer to check if ID is 1 or 2, Then assign it to corresponding new IDs.