Error adding Custom Option in magento - magento

Question

I have this error "Fatal error: Uncaught exception 'Mage_Eav_Model_Entity_Attribute_Exception' with message 'SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '6152-0-11-0' for key"
Whe add custom optión programatically in magento, i use this function:
function createCustomOption($value, $customoptions_price, $sku, $title, $type, $noOption = false)
{
$custom_options = array();
if ($type && $value != "" && $value) {
$values = explode(',', $value);
$skus = explode(',', $sku);
$is_required = 1;
$customoptions_prices = explode(',', $customoptions_price);
if (count($values)) {
/**If the custom option has options*/
if (! $noOption) {
$is_required = 1;
$sort_order = 0;
$custom_options[ ] = array(
'is_delete' => 0,
'title' => $title,
'previous_group' => "",
'previous_type' => "",
'type' => $type,
'is_require' => $is_required,
'sort_order' => $sort_order ,
'values' => array()
);
for($i = 0; $i < (count($values)) ; $i++)
{
switch ($type) {
case 'drop_down':
case 'radio':
case 'checkbox':
case 'multiple':
default:
$custom_options[count($custom_options)-1]['values'][ ] = array(
'is_delete' => 0,
'title' => $values[$i],
'option_type_id' => –1,
'price_type' => 'fixed',
'price' => $customoptions_prices[$i],
'sku' => $skus[$i],
'sort_order' => $i);
break;
}
}
return $custom_options;
}
/**If the custom option doesn't have options | Case: area and field*/
else {
$is_required = 1;
$sort_order = 0;
$custom_options[ ] = array(
"is_delete" => 0,
"title" => $title,
"previous_group" => "text",
"price_type" => 'fixed',
"price" => "0",
"type" => $type,
"is_required" => $is_required
);
return $custom_options;
}
}
}
return false;
}
I call it from here:
$product = Mage::getModel('catalog/product')->load(6152);
unset($optionData);
$precio = 100;
$custom_title = "Unidad,Caja de 10 unidades";
$customoptions_price = "0,".$precio."";
$prod_sku = "unidadesku,cajasku";
$customoption_main_title = "Seleccione unidades o cajas";
$option_type = "drop_down";
$optionData[ ] = createCustomOption($custom_title, $customoptions_price, $prod_sku, $customoption_main_title, $option_type);
if(count($product->getOptions()) == 0){
foreach ($optionData as $options) {
foreach ($options as $option) {
$opt = Mage::getModel('catalog/product_option');
$opt->setProduct($product);
$opt->addOption($option);
$opt->saveOptions();
}
}
$product->setHasOptions(1)->save();

Answer 1

I solved it adding in my script this line:
Mage::app()->setCurrentStore(Mage_Core_Model_App::ADMIN_STORE_ID);