How would I make multiple variables into random number, but not the same random number?

I.e. if I wanted to make 8 variables a random number between 1 and 30 but I cannot allow them to be the same number.

Create a permutation table using Advanced Random from 1 to 30, this will be all the numbers from 1 to 30 randomly shuffled. Then use the first 8 numbers for the variable, expression is for example Advancedrandom.Permutation(0) for the first number.