One to One relationship show just in one module

Hi i made two modules with module builder (A and B).

That modules are related One to One, i made the relationship in the module B but in the other module (A) i cannot see the relationship.

In vardefs the relationship doesn’t appear.

In a logic hook i try to access the B module through A module but i cannot do it.

am i missing something?

Thanks.

I solved this by getting the field name in file vardefs.ext.php in ‘custom/modules/<module_name>/Ext/Vardefs’