Rentrun Value Only to First Instance Of Lookup Value

Hi,

I'm trying to return a value to a data set but only the first instance of the lookup value. In the attached I have what I'm currently using and don't want and then what I am looking for in the below section.

Let me know if this is not clear. TY

You can use IF condition with Vlookup

=IF(C4=C3,"",VLOOKUP(C4,$I$4:$J$8,2,FALSE))