Not unique KEYs warning

[OleksandrBohuslavskyi]

@banomaster @fortunar
Hi guys,
I found collisions of unique keys.

You use url, thinking that the it's should be unique, but in my case i have duplicates and I've got an errors because of that and:

So, i found place, you just need to concatenate item.value and some random integer value.

Thanks.