Hi, I need some help.
I have 2 list called A and B.
List A has information as Name and rate.
List B has a vlookup from List A with name. So, the user can select a name
I don´t want duplicates, for example: I create an Item with Luis M in list B, if I create a New Item Luis M is available. How can I avoid this? I want that a New Item doesn't available with existing items