# in edit() method:
# to avoid ambiguity error
change:
$recordset = $this->m_destInstance->select($this->m_destInstance->m_primaryKey[0])->includes($tmp2)->getAllRows(); // original
to:
$recordset = $this->m_destInstance->select($this->m_destInstance->getTable() . '.' . $this->m_destInstance->m_primaryKey[0])->includes($tmp2)->getAllRows(); // by Jorge Garifuna
# to have the correct selected value in the drop down list
change:
$this->m_current = $this->m_ownerInstance->primaryKey($record); // original
to:
$this->m_current = $this->m_ownerInstance->primaryKey($record[$this->fieldName()]); // by Jorge Garifuna
