Can a changeling increase their Charisma by +3 at character creation?

In Eberron: Rising from the Last War, the changeling race says the following (p. 18):

Ability Score Improvement. Your Charisma score increases by 2. In addition, one ability score of your choice increases by 1.

Is there anything stopping you from choosing Charisma again for your additional +1? It seems a bit cheeky to me, since no other race can have a +3 at character creation, but on the other hand, the two sentences do seem to be rather deliberately disjointed. It’s not like the wording of the half-elf’s ability score improvement, as this Q&A explains, so does that mean that gaining a +3 to Charisma is a legitimate choice?

Obviously this is assuming that a DM doesn’t insist otherwise, and we are also assuming that this won’t allow an ability score to go above 20