Use default picture for bulk CSV Upload

[king_of_foil]

Hello,

the CSV bulk upload works great so far. We have many many sewing machines spare parts to upload to the shop. Talking about 20000 (twenty thousand) of spare parts and more per machine brand!

As we don´t have pictures or drawings to this massive amount of data, we created a default procut picture showing our brand name and the brand name of the spare parts company. For reference: https://www.bischof-naehmaschinen.de/products/b50032230a0-cloth-presser-joint-left-asm

However we faced the problem that we have now (in the case of JUKI spare parts) 60.000 times the same default image uploaded to our shopify backend and it is very difficult to search for other pictures we already used.

I already try to solve the problem with GPT and the recommendation was to not use the URL of a internal shopify image, but to use it from a different public website. We did so (uploaded to one of our different websites as a new public source), but still Shopify uploads the picture for every new item and saves it as a separate file with new name in the image storage of Shopify.

To sum it up: How can we avoid to mutliply upload the same default image every time again when using csv uploads?
I hope I made my problem clear.

Thank you!!