Question

Congrats on the full requests flooding in!

Some agencies are OK with you querying an agent in the same agency once the first agent has passed. It depends on the agency guidelines. However, my suggestion: apologise, explain that you've made a mistake, and that XXX is reading your manuscript. Thank them for their interest. Something like this? "I'm so sorry, I realise I've made quite a mess of querying your agency! I actually accidentally queried XXX too and they requested my full last week... Please forgive my rookie mistake, and thank you so much for your interest."

I'm sure you'll write something better.

I hope it works out for you. Good luck!

Before you reply maybe wait and see what advice others weigh in with, but I do feel that honesty is the best policy. It was a rookie mistake. Querying is very stressful, and I sense many agents understand that.

Yeah. Sometimes we don't notice that folks work at the same place. Best policy in this case is definitely honesty. Explain that someone else at the agency already has the full MS and, unfortunately, you queried both of them at the same time and you appreciate their understanding. You might suggest that they collaborate with the other agent as, if it's not a good fit for agent #1 it might be a good fit for agent #2.

Enthusiasm is a good sign, though. Even if you feel a bit clumsy about the querying process.