diff --git a/src/inventory/adapters/output/db/postgres/customization_name_exists_for_product.rs b/src/inventory/adapters/output/db/postgres/customization_name_exists_for_product.rs
index b2a3daa..8e2aa35 100644
--- a/src/inventory/adapters/output/db/postgres/customization_name_exists_for_product.rs
+++ b/src/inventory/adapters/output/db/postgres/customization_name_exists_for_product.rs
@@ -14,7 +14,6 @@ impl CustomizationNameExistsForProductDBPort for InventoryDBPostgresAdapter {
     async fn customization_name_exists_for_product(
         &self,
         c: &Customization,
-        product_id: &Uuid,
     ) -> InventoryDBResult<bool> {
         let res = sqlx::query!(
             "SELECT EXISTS (
@@ -28,7 +27,7 @@ impl CustomizationNameExistsForProductDBPort for InventoryDBPostgresAdapter {
                     deleted = false
             );",
             c.name(),
-            product_id,
+            c.product_id()
         )
         .fetch_one(&self.pool)
         .await?;
@@ -71,7 +70,7 @@ mod tests {
 
         // state doesn't exist
         assert!(!db
-            .customization_name_exists_for_product(&customization, &product_id)
+            .customization_name_exists_for_product(&customization)
             .await
             .unwrap());
 
@@ -79,7 +78,7 @@ mod tests {
 
         // state exists
         assert!(db
-            .customization_name_exists_for_product(&customization, &product_id)
+            .customization_name_exists_for_product(&customization)
             .await
             .unwrap());
 
@@ -103,7 +102,7 @@ mod tests {
         .await
         .unwrap();
         assert!(!db
-            .customization_name_exists_for_product(&customization, &product_id)
+            .customization_name_exists_for_product(&customization)
             .await
             .unwrap());
 
diff --git a/src/inventory/application/port/output/db/customization_name_exists_for_product.rs b/src/inventory/application/port/output/db/customization_name_exists_for_product.rs
index 632260b..311ccf3 100644
--- a/src/inventory/application/port/output/db/customization_name_exists_for_product.rs
+++ b/src/inventory/application/port/output/db/customization_name_exists_for_product.rs
@@ -19,7 +19,6 @@ pub trait CustomizationNameExistsForProductDBPort: Send + Sync {
     async fn customization_name_exists_for_product(
         &self,
         c: &Customization,
-        product_id: &Uuid,
     ) -> InventoryDBResult<bool>;
 }
 
@@ -39,10 +38,10 @@ pub mod tests {
         if let Some(times) = times {
             m.expect_customization_name_exists_for_product()
                 .times(times)
-                .returning(|_, _| Ok(false));
+                .returning(|_| Ok(false));
         } else {
             m.expect_customization_name_exists_for_product()
-                .returning(|_, _| Ok(false));
+                .returning(|_| Ok(false));
         }
 
         Arc::new(m)
@@ -55,10 +54,10 @@ pub mod tests {
         if let Some(times) = times {
             m.expect_customization_name_exists_for_product()
                 .times(times)
-                .returning(|_, _| Ok(true));
+                .returning(|_| Ok(true));
         } else {
             m.expect_customization_name_exists_for_product()
-                .returning(|_, _| Ok(true));
+                .returning(|_| Ok(true));
         }
 
         Arc::new(m)
diff --git a/src/inventory/application/services/add_customization_service.rs b/src/inventory/application/services/add_customization_service.rs
index e72190f..9dcedcf 100644
--- a/src/inventory/application/services/add_customization_service.rs
+++ b/src/inventory/application/services/add_customization_service.rs
@@ -83,7 +83,7 @@ impl AddCustomizationUseCase for AddCustomizationService {
 
         if self
             .db_customization_name_exists_for_product
-            .customization_name_exists_for_product(&customization, cmd.product_id())
+            .customization_name_exists_for_product(&customization)
             .await?
         {
             return Err(InventoryError::DuplicateCustomizationName);