Do all four of the reported centrals look like that one?
It looks like there might be a little bit of a spike right before it, so it may not be a "real" central. Something may have disturbed your sleep, causing you to sigh, cough, etc. If that's the case, then it could just be a sleep onset central, no biggie. On the other hand, that spike isn't that big, so I suppose it *could* be a real one.
Besides, you're not having enough of them to really bother with it anyway. Everyone experiences some, I wouldn't worry about those unless they're packed together and happen often.
This video explains how to moderately tell the difference between a real central and a "false" one. A real central can only be real when you're actually asleep, and when something wakes you up (but not to the point of formulating a memory of waking up), that may trigger a central event, except you're not actually asleep, so it doesn't count. Here's the vid:
https://www.youtube.com/watch?v=xallwxPCg84
But, I'm also not an expert, and I never stay at Holiday Inn Express, so take what I say as a grain of salt. I'm sure someone with more oomph will chime in soon.