Why add the ~들 particle to 우리? Isn't it always implied to be plural?
2017-12-25 and it won't accept the answer without 들 in it.
March 6 2019 and it still doesn't accept 우리는
march 28, 2020 and still not accepted
May 20, 2020 and still not accepted
July 16, 2020 and still not accepted
It does not necessarily make the sentence wrong.
Think of adding 'do' like in:
"I do love you."
Yes, it's a pleonasm
It would signify "all of us"