I've got to application

Good morning,
My name is Maria.
I have a problem with my student finance application.
The thing is that I've got tow applications, 2 different CRN, and the one of them is the one which I applied for my university and the second one is from a letter from Student finance, which came to support my husband student finance application. That's way I made the second application. My thing is that I tried to upload my NINO to apply for finance and it says that it is already in the sistem. I don't know what to do next. Can anyone help me, please? Thank you!