Received 143(1) demand for original (but not revised) itr

I had filed an ITR 4 return (original) and paid Rs. 6800 as tax due. I then realized that I had to file an ITR 3 return instead and duly filed a (revised) return.

A few days ago, I received a 143(1) intimation demanding Rs. 6800 on the original return, and it stated that the department could not trace the 6800 payment made.

Should I ignore this and wait for the assessment on the revised return to be completed?

Please advice, and thank you in advance.