My Phanteks Enthoo Pro case arrived. It's great except one of the tags from the optical drive slot fell off at some point and landed on the damn rear fan blade of all places. How does that even happen?

This is what I plan on putting inside it by the way. I haven't built a PC from the ground up since before the pandemic, so comments on what I have picked out are welcome: https://ca.pcpartpicker.com/user/Duck109/saved/#view=4CHPK8