I've recently started working with Magento and I'm facing a pretty basic problem that I can't manage to figure out. When creating a new product, from the admin page, Catalog -> Products -> New Product, I'm being redirected to a form. After completing the required fields, I receive an error message:
The value of attribute "sku" must be set
Which is a problem, as I don't have any SKU field in my form. I've looked for this problem, without any result, and I found out that SKU should be somewhere between Product Name and Price. Unfortunately, that's not my case.
Any ideas what should I do in this case? Thank you!
P.S. My version of Magento is the latest one, 2.2.3.