We have our odoo running as saas, so no access to code, logs or whatever. So in settings->Technical->Database Structures->models I created a model  x_test. Now in res.partner model i created a new custom field with Field Type = many2one and Object Relation = x_test.

But it does not work, I always have the error no reference in found in x_test. Can someone help on this? I am not sure about the models, in x_test i created a field x_id of type integer. But maby it is looking for field "id"?

With existing tables it works, but not with custum models.

Thanks.