it was not until they had a discussion where they argued a lot

it was not until they had a discussion where they argued a lot that they made a final dicision about the project.

为什么这里用的是where ?discussion where they argued

时隔四年突然看到这个答案= =，吃不消，我自己解答一下好了。因为ague在这里是不及物动词，要用介词搭配，所以这里采用where不然应该用over/about which.

I was not enjoy it Experts said it was not dangerous __________ it was approached It was not long....before的用法 It was hard physically, but not mentally It was not until the Qin Dynasty I COULD NOT BELIEVE IT WAS OVER it was not until yeasterday to have we knew it. It was not until liberation that ____to his hometown. it was not until 1920 ( ) regular radio broadcast began. It was stupid _ me not to take your advice