diff --git a/bin/build-db b/bin/build-db
index bb9f4bee7..d874b3241 100755
--- a/bin/build-db
+++ b/bin/build-db
@@ -22,35 +22,60 @@ try {
   process.exit(1);
 }
 
-function getJson(path) {
+function parseAndValidate(path, idKeyName = "id") {
   const raw = JSON.parse(fs.readFileSync(path).toString());
+  if (idKeyName && Array.isArray(raw)) {
+    try {
+      validatePrimaryKeys(raw, idKeyName);
+    } catch (err) {
+      console.error(`🚨 ERROR building ${path}:\n   ${err}`);
+      process.exit(1);
+    }
+  }
   // Adapts a standard JSON string to what is expected to be the format
   // used in Elm's template strings (`"""{}"""`).
   return JSON.stringify(raw).replaceAll("\\", "\\\\");
 }
 
+/**
+ * Validates that unique identifiers are actually unique in provided datasource.
+ */
+function validatePrimaryKeys(records, idKeyName) {
+  const ids = records.map((record) => record[idKeyName]).sort();
+  const duplicates = ids.filter((item, index) => ids.indexOf(item) !== index);
+  if (duplicates.length > 0) {
+    throw new Error(`Duplicate ${idKeyName}: ${duplicates}`);
+  }
+}
+
 const targetDbFile = "src/Static/Json.elm";
 const elmTemplate = fs.readFileSync(`${targetDbFile}-template`).toString();
 const elmWithFixtures = elmTemplate
   // Transverse JSON data
-  .replace("%countriesJson%", getJson("public/data/countries.json"))
-  .replace("%impactsJson%", getJson("public/data/impacts.json"))
-  .replace("%transportsJson%", getJson("public/data/transports.json"))
+  .replace("%countriesJson%", parseAndValidate("public/data/countries.json", "code"))
+  .replace("%impactsJson%", parseAndValidate("public/data/impacts.json"))
+  .replace("%transportsJson%", parseAndValidate("public/data/transports.json"))
   // Food JSON data
-  .replace("%foodIngredientsJson%", getJson("public/data/food/ingredients.json"))
+  .replace("%foodIngredientsJson%", parseAndValidate("public/data/food/ingredients.json", "id"))
   .replace(
     "%foodProcessesJson%",
-    getJson(NODE_ENV === "test" ? dataFiles.foodDetailed : dataFiles.foodNoDetails),
+    parseAndValidate(NODE_ENV === "test" ? dataFiles.foodDetailed : dataFiles.foodNoDetails, "id"),
   )
-  .replace("%foodProductExamplesJson%", getJson("public/data/food/examples.json"))
+  .replace("%foodProductExamplesJson%", parseAndValidate("public/data/food/examples.json", "id"))
   // Textile JSON data
-  .replace("%textileMaterialsJson%", getJson("public/data/textile/materials.json"))
+  .replace("%textileMaterialsJson%", parseAndValidate("public/data/textile/materials.json", "id"))
   .replace(
     "%textileProcessesJson%",
-    getJson(NODE_ENV === "test" ? dataFiles.textileDetailed : dataFiles.textileNoDetails),
+    parseAndValidate(
+      NODE_ENV === "test" ? dataFiles.textileDetailed : dataFiles.textileNoDetails,
+      "uuid",
+    ),
+  )
+  .replace(
+    "%textileProductExamplesJson%",
+    parseAndValidate("public/data/textile/examples.json", "id"),
   )
-  .replace("%textileProductExamplesJson%", getJson("public/data/textile/examples.json"))
-  .replace("%textileProductsJson%", getJson("public/data/textile/products.json"));
+  .replace("%textileProductsJson%", parseAndValidate("public/data/textile/products.json", "id"));
 
 const header =
   "---- THIS FILE WAS GENERATED FROM THE FILE `Json.elm-template` BY THE `/bin/build-db` SCRIPT";
diff --git a/public/data/textile/examples.json b/public/data/textile/examples.json
index 0e9ca887f..710b892cf 100644
--- a/public/data/textile/examples.json
+++ b/public/data/textile/examples.json
@@ -447,7 +447,7 @@
     }
   },
   {
-    "id": "f48d7a6b-68db-4d1c-9623-6ec0ab89cbdb",
+    "id": "6a2da9ff-9120-4a47-91ad-a8e72be45f4a",
     "name": "Tshirt coton (150g) - Remanufacturé",
     "category": "Tshirt / Polo",
     "query": {
diff --git a/src/Data/Textile/Inputs.elm b/src/Data/Textile/Inputs.elm
index bb667d593..ca03a9055 100644
--- a/src/Data/Textile/Inputs.elm
+++ b/src/Data/Textile/Inputs.elm
@@ -446,7 +446,7 @@ getOutOfEuropeEOLProbability materialInputs =
                 |> getMaterialCategoryShare Origin.Synthetic
     in
     Split.fromFloat
-        (if Split.toPercent syntheticMaterialsShare >= 10 then
+        (if Split.toPercent syntheticMaterialsShare >= 50 then
             0.121
 
          else
diff --git a/tests/e2e-textile.json b/tests/e2e-textile.json
index 97dd124fe..ee03eaee0 100644
--- a/tests/e2e-textile.json
+++ b/tests/e2e-textile.json
@@ -207,7 +207,7 @@
       "swe": 0.08000116470598892,
       "tre": 0.5022110547143145,
       "wtu": 35.180613817523366,
-      "ecs": 5039.336827561499,
+      "ecs": 4811.167813476992,
       "pef": 3052.638092437028
     }
   },