Hi,
So if I understand correctly, you're using the HikaShop Product Cron Update plugin in order to import your CSV, is that right ?
The best would be to understand why this happens since it doesn't on our end.
Could you look at the data in that hikashop_file table ?
What is wrong with the entries there ?
Do you have a lot of entries for each product ? Or maybe most of the entries are for product_ids that don't exist (in the column file_ref_id) ? Maybe something else ?
As a quick fix, I suppose you could just empty the whole table in PHPMyAdmin before running the import of your CSV once. That should fix the problem temporarily, until the images entries gets added back in the table little by little.