Most of the worlds brought in seem to be those with magic. None seem to be purely non-magical in nature, so if there is no magic in your world, it may be safe.

Though there's always the risk your world might have magic you don't know about. In my world, wizards keep magic a secret from muggles - non-magic users. If your world is similar, if there's magic you simply don't know about, there's a risk that it might have lands transplanted here - and we still have no idea what's left behind when it happens.