Schweser Book 1 p.281 Q5 - Why is this Anchoring??

The guy says about the stock he holds to his advisor - “We don’t want to lose money, so please wait to sell until it comes back.” According to Schweser’s answer, his "reluctance to sell the stock until it returns to its earlier high is best described as anchoring. Why exactly is this anchoring and not loss aversion? I’m at a loss here…

Sorry, it was discussed. Please ignore my post. I wish Schweser would updated their errata. Looks like they don’t bother.