how to delete the duplicated rows (in a specific way)?

i have this table (size:8*6 & cells):

and i want to delete duplicated rows with saving the 6th column in the original row.

i want the answer to be (table, size(5*8) , cell):

i have a larger data this is a sample, I hope that pictures clarify the problem.

Answer 1

[Andrei Bobrov]

a = [text{:,1}];
m = numel(a);
[~,b1,c1] = unique(a,'first');
n = ones(m,1);
n(b1(2:end)) = 1-diff(b1);
i1 = accumarray([c1, cumsum(n)],(1:m)',[],[],m+1);
txt1 = [text(:,6);{''}];
out = [text(b1,1:5),tx1(i1)];