Problem with numbers of Models

I had two good models created, then I just wanted to test the best possible way to make the model - and I made third one with some set of photos. Then I deleted that model and wanted to make it with different set because the quality was not right. So I deleted but system doesn’t allow me to make another one [but I have 2 models now and I should be able to make third].

IF system is designed this way that you can make only three even if you delete one of them - there should be a proper warning when uploading the photo and building the model :/.