Error Message when resubmitting TAU with same information

I submitted my TAU on 1/18/2020, but yesterday, I felt unsure about something, so I decided to resubmit it with the same information I inputted previously, but then I got an error message saying that it the information was already submitted and there was no need to submit another TAU. As the deadline apporaches I can’t help but feel stressed out. Is my original TAU submission still intact despite this error message? On my application, it says “TAU submitted 1/18/2020” next to view application.

Yes they have the first.

So there’s nothing else I need to do? I only need to submit the TAU once, right?

Just to be sure, I would email ucinfo@applyucsupport.net They helped me with my question regarding the TAU.