update food

src/modules/foods/providers/food.service.ts

@@ -88,6 +88,9 @@ export class FoodService {
     // attach new categories if provided (adds, does not attempt to preserve/remove existing ones)
     if (Array.isArray(categoryIds) && categoryIds.length) {
       const categories = await this.categoryRepository.find({ id: { $in: categoryIds } });
+
+      food.categories.removeAll();
+
       categories.forEach(cat => {
         // Collection.add will ignore duplicates
         food.categories.add(cat);