Avoid P1889 constraint

[bouzinac]

Hello, P1889 is a specific property stating that A must be different from B and B different from A.
However, when harvest-templatating {{Distinguish}}, P1889 could not be farmed because of this constraint. Could there be an exception of constraint when farming P1889 ?

[Pascalco]

With the new version of the tool, you can disable non-mandatory constraints.