Is it ok to mix heddles?

Is it ok to mix heddles?

I recently bought a used vintage baby wolf. I’m planning out a project for it, but I’ve noticed that it currently does not seem to have enough heddles.

The heddles that are currently on the loom are not the inserted eye ones that are for sale online on the schacht website. They are flat with a diamond shaped hole. Is it fine to mix these two types of heddles?