This is a minimization problem, but when I enter some constraints, i1 takes the values j1, i2, j2 in the table value and my result is 0. How can I add a constraint so that i is not equal to j?

sets

i /1*4/
j / 1*4/

table

0 1 2 3 4

0 0 114 86 7 17

1 114 0 72 39 75

2 86 72 0 65 63

3 7 39 65 0 83

4 17 75 63 83 0

binary variables

x(i,j)

Equations

object

equ1

object…z=e=sum ((i,j),T(i,j)*X(i,j));

model TEZ /all/

solve TEZ minlp minimizing z