matanui159

This is just a quick question. I'm adding my first modpack, being called MataPack, and I'm getting the error: The name has already been taken. The modpack name you entered has a slug that already exists. I understand the first half (although I am surprised, I thought the name was pretty unique), but what does the second half mean? I already had a look around on the internet but couldn't find anything. Thanks in advance.