form_set_error('fields][_add_new_field][field_name',t('Add new field: the field name %field_name is invalid. The name must include only lowercase unaccentuated letters, numbers, and underscores.',array('%field_name'=>$field_name)));
}
if(strlen($field_name)>32){
form_set_error('fields][_add_new_field][field_name',t("Add new field: the field name %field_name is too long. The name is limited to 32 characters, including the 'field_' prefix.",array('%field_name'=>$field_name)));
}
// Field name already exists. We need to check inactive fields as well, so