diff --git a/Config/module.xml b/Config/module.xml
index bfbd6d1..ebacc9a 100755
--- a/Config/module.xml
+++ b/Config/module.xml
@@ -7,7 +7,7 @@
     <descriptive locale="fr_FR">
         <title>CSV Importer</title>
     </descriptive>
-    <version>1.0.10</version>
+    <version>1.0.11</version>
     <author>
         <name>Thelia</name>
         <email>info@thelia.net</email>
diff --git a/Service/CsvParserService.php b/Service/CsvParserService.php
index 5c30134..ed75964 100644
--- a/Service/CsvParserService.php
+++ b/Service/CsvParserService.php
@@ -3,6 +3,7 @@
 namespace CsvImporter\Service;
 
 use Symfony\Component\Yaml\Yaml;
+use Thelia\Log\Tlog;
 
 class CsvParserService
 {
@@ -27,7 +28,7 @@ public function mapToArray(array $productData): array
         }
         foreach ($this->mapping as $fieldName => $header) {
             $mappedData[$fieldName] = $productData[$header] ?? null;
-            }
+        }
 
 
         return $mappedData;
@@ -50,4 +51,29 @@ private function getAttributeColumns(array $productData): array
         return $this->getColumns($productData, self::ATTRIBUTE_DISCRIMINATOR);
     }
 
+    /**
+     * Issue a warning for each missing column in a file header
+     *
+     * @param array $headers
+     * @return void
+     */
+    public function checkHeaders(array $headers): void
+    {
+        foreach ($this->mapping as $fieldName => $headerLabel) {
+            if (! in_array($headerLabel, $headers, true)) {
+                Tlog::getInstance()->warning("Column \"$headerLabel\" not found, some data could be missing after import");
+            }
+        }
+
+        foreach ($headers as $headerLabel) {
+            if (!in_array($headerLabel, $this->mapping, true)
+                &&
+                !str_starts_with($headerLabel, self::ATTRIBUTE_DISCRIMINATOR)
+                &&
+                !str_starts_with($headerLabel, self::FEATURE_DISCRIMINATOR)
+            ) {
+                Tlog::getInstance()->warning("Found additional \"$headerLabel\" column. This column will be ignored.");
+            }
+        }
+    }
 }
diff --git a/Service/CsvProductImporterService.php b/Service/CsvProductImporterService.php
index fe35a12..ec94ff3 100644
--- a/Service/CsvProductImporterService.php
+++ b/Service/CsvProductImporterService.php
@@ -12,6 +12,7 @@
 
 namespace CsvImporter\Service;
 
+use Propel\Runtime\ActiveQuery\Criteria;
 use Propel\Runtime\Exception\PropelException;
 use Psr\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\Console\Output\OutputInterface;
@@ -35,6 +36,7 @@
 use Thelia\Core\Event\Template\TemplateAddFeatureEvent;
 use Thelia\Core\Event\Template\TemplateCreateEvent;
 use Thelia\Core\Event\TheliaEvents;
+use Thelia\Exception\TheliaProcessException;
 use Thelia\Files\FileManager;
 use Thelia\Log\Tlog;
 use Thelia\Model\Attribute;
@@ -169,6 +171,9 @@ public function importProductsFromCsv(string $filePath, string $basedir, Country
         $line = 0;
 
         $headers = fgetcsv($handle);
+
+        $this->csvParser->checkHeaders($headers);
+
         while (($data = fgetcsv($handle)) !== false) {
             $line++;
 
@@ -358,6 +363,17 @@ private function findOrCreateProduct(array $productData, Country $country, strin
             Tlog::getInstance()->addInfo('Created product ' . $productData[self::TITLE_COLUMN]);
         }
 
+        // Si un produit avec la même ref existe, refuser la modification
+        if (ProductQuery::create()
+                ->filterById($product->getId(), Criteria::NOT_EQUAL)
+                ->filterByRef($productData[self::REF_COLUMN])
+                ->count() > 0
+        ) {
+            throw new TheliaProcessException(
+                'Failed to import product ref. ' . $productData[self::REF_COLUMN] . ': a product with the same ref. already exists.'
+            );
+        }
+
         return $this->dispatchProductEvent(new ProductUpdateEvent($product->getId()), $productData, $locale, $category, $country);
     }
 
@@ -377,8 +393,8 @@ private function dispatchProductEvent(
             ->setLocale($locale)
             ->setTitle($productData[self::TITLE_COLUMN])
             ->setDefaultCategory($category->getId())
-            ->setBasePrice($productData[self::PRICE_EXCL_TAX_COLUMN])
-            ->setBaseWeight($productData[self::WEIGHT_COLUMN] ?? 0)
+            ->setBasePrice($this->cleanupNumber($productData[self::PRICE_EXCL_TAX_COLUMN]))
+            ->setBaseWeight($this->cleanupNumber($productData[self::WEIGHT_COLUMN] ?? 0))
             ->setTaxRuleId($this->findOrCreateTax($productData, $country, $locale)->getId())
             ->setVisible(1)
             ->setCurrencyId(1);
@@ -449,9 +465,10 @@ private function createOrUpdateProductSaleElements(Product $product, array $prod
             }
         }
         $event = new ProductSaleElementUpdateEvent($product, $productSaleElement->getId());
-        $event->setWeight($productData[self::WEIGHT_COLUMN])
+        $event
+            ->setWeight($this->cleanupNumber($productData[self::WEIGHT_COLUMN]))
             ->setProductSaleElement($productSaleElement)
-            ->setPrice($productData[self::PRICE_EXCL_TAX_COLUMN])
+            ->setPrice($this->cleanupNumber($productData[self::PRICE_EXCL_TAX_COLUMN]))
             ->setEanCode($productData[self::EAN_COLUMN])
             ->setReference($productData[self::REF_COLUMN])
             ->setCurrencyId(1)
@@ -724,4 +741,9 @@ private function copyFile(string $filePath): string
 
         return $newFilePath;
     }
+
+    protected function cleanupNumber(string $number)
+    {
+        return (float) preg_replace("/[^0-9.,]/", '', str_replace(',', '.', $number));
+    }
 }