SQLRelationTableModel foreign key to own PK?

Question

SQL

Hello.
I use qt + sqlite. I created the Sensors table in it with a foreign key pointing to the same table (to the primary key). I need each Sensor instance to have information about another Sensor for temperature compensation. I create QSqlRelation for foreign key

int idSensorFK = m_sensors_model->fieldIndex("FK_Termocomp");
m_sensors_model->setRelation(idSensorFK, QSqlRelation("Sensors", "idSensor", "SensorName"));

I do select
I receive ambiguous column name for each field.
How can SQLRelationTableModel serve external keys on the table itself?