diff --git a/src/models/recipe.rs b/src/models/recipe.rs
index 30a06b7..7c21582 100644
--- a/src/models/recipe.rs
+++ b/src/models/recipe.rs
@@ -9,6 +9,8 @@ use rayon::iter::{IndexedParallelIterator, IntoParallelRefIterator, ParallelIter
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 
+use crate::recipe_functions::common::MATERIAL_INTER_GUARD;
+
 pub trait CommonRecipeTrait {
     fn insert_comment(&mut self, comment: String);
 
@@ -1849,10 +1851,10 @@ impl MaterialSetting {
             let cc = country_code.unwrap().parse::<i64>().expect("not a number");
             let mat_num = self.id.clone().as_i64().unwrap();
 
-            let check_if_start_with_cc = mat_num.to_string().starts_with(&format!("{cc}"));
+            let check_if_start_with_cc = mat_num > MATERIAL_INTER_GUARD as i64;
 
             if check_if_start_with_cc {
-                mat_num - (cc * 10000)
+                mat_num - (cc * MATERIAL_INTER_GUARD as i64)
             } else {
                 mat_num
             }