After cleaning one of my hoods with Hood Checker I was left with a couple of errors and I was wondering if I should be worried or not.

First, some User File Warnings about sims not having character files, which I'm pretty sure are because I have a pollination technician mod, and then two memories errors concerning one specific sim of mine:

Sim does not exist: 0x002F Todd Berry: [Invisible] Pregnant by 0x00B7
Subject does not exist: 0x002F Tod Berry: Met SimID=0x0087BB01

He was a townie that moved into one of my families and is currently pregnant from being abducted by aliens, and I should mention that he also has been buggy since I moved him in, his want slots sometimes show up blue, just empty, it gets fixed sometimes when they get rerolled or a want is fulfilled but eventually go back to being empty. I remember looking it up and not really being able to fix it, but I think I also read it doesn't mean corruption.

Lastly I have three errors in memories that say "subject does not exist" and involve townies meeting SimID=0x13AD37CA. I read online that this is caused by some NPCs from Bon Voyage and you shouldn't worry, but I don't have any vacation subhoods attached to my hood.

Well, what sim does ACR/Sim Blender/etc. say is the father of his baby?

Sim Blender says the father is "§fullnamelocal:1".

Then it looks like the pregnancy token isn't pointing at an actual sim anymore. Did you take the pollination technicians out of the downloads folder?