Long nap in the afternoon?

Do you think a long nap in the afternoon can negatively affect a baby who is almost 2 months night sleep? If so, should I wake them after a certain amount of time of sleeping?

My baby has been sleeping through the night for the most part (between 7-10 hours) and this is the 2nd time she is taking a long nap in the afternoon. I was wondering if I should wake her to avoid her being up all night. What do you think? How long should I let her sleep?