Fixes IX_UrlRecord_Slug duplicate key violation when copying a prod…

…uct if the localized name of two or more languages is identical #901

(cherry picked from commit 000e07c)

src/Smartstore.Core/Catalog/Products/Services/ProductCloner.cs

@@ -223,7 +223,7 @@ private async Task ProcessSlugs(Product product, Product clone, IEnumerable<Lang
             {
                 string name = product.GetLocalized(x => x.Name, lang, false, false);
 
-                await _urlService.SaveSlugAsync(clone, string.Empty, name, false, lang.Id, true);
+                await _urlService.SaveSlugAsync(clone, string.Empty, name, false, lang.Id);
             }
         }