Looks innocuous enough at first glance right? Let's zoom in on the problem:
These don't go together. If the semicircle on the left is correct, then this is showing moon phases, and the symbol on the right should be of a gibbous moon:
If the cookie-with-a-bite-taken-out in the right is correct, then this is showing an eclipse, and the symbol on the left should be of a 50% partial eclipse:
Yeah, I was pondering if it'd be possible to make it less of an issue. I presume the metal of the discs and chain is pretty thin, so you could get to work with tin snips, a file and some needle-nose pliers. Take them off, rework some and hang them back up. However, a) I'm not sure it could be done satisfactorily and b) that sounds like a lot of hassle for some, hopefully, cheap knickknack, so I'd probably just make it have an accident.
That's not the issue. The artist has decided that the cutout is the shadow, and just made ot "move across" the moon. This is now how light hitting the moon looks from Earth.
@[email protected] may I suggest pretending you are looking at it from the perspective of an asteroid 30 degrees "above Earth" and circling us. That would make it accurateish.