Cannot delete Product Versions

When I select the option to remove an unneeded version of a product, that 'version' is moved down and the section panel receives the 'unsaved changes' note on top. Clicking the 'Save Changes' button does not save the change however, the button does not function and the version cannot be removed. In a browser debugger it looks like there's a code error? I will attach an image. Possible code is not allowing '0' versions, not allowing 'base version' only? This effects the checkout process and store/product questions - customers are confused.