Who knows, perhaps there was even a stain of some sort on the name? We know Starfleet thinks positively of the carrier CVN-65, using her as a decorative motif in several places, and of the STS orbiter (which in that universe apparently actually orbited and docked with Space Station Freedom). But some other Enterprise
from beyond the 1980s, perhaps CVN-93 or SSBN-1102, might have been infamous for failing to perform, or for fighting for the bad guys. And neither the ringship nor the first warp five explorer was enough to restore the reputation, at least not beyond "neutral".