How to avoid repetition in for loop that is using randi

I have the following loop where I fill IDCELL with different combinations of ID numbers. However, if a combination of ID numbers already exists, I want the loop to move on and try again. VID1, VID2 are two 3x3 cells.

for o=1:numel(INCREASE2)
   
    for oz=1:999

index=randi([1,numel(VID1)]);
 ID1 = VID1{index};


index2 = randi([1, numel(VID2)]);
ID2 = VID2{index2};

%ID1 and ID2 cannot be the same number
      if numel(intersect(ID1,ID2))|| %some statement here
 continue
      else
          IDCELL{o}={ID1; ID2};
         
          break
      end
    end
    
end

Answer 1

[Alan Stevens]

Does randperm do what you want?

help randperm

[Joel Schelander]

yes, thank you