diff --git a/src/categories.yaml b/src/categories.yaml
index 98b2733f..111c347b 100644
--- a/src/categories.yaml
+++ b/src/categories.yaml
@@ -12,7 +12,7 @@
   name: Layer 2
 - id: hardware
   name: Hardware
-- id: vpm
+- id: vpn
   name: VPN
 - id: did
   name: DID
@@ -38,8 +38,8 @@
   name: NFT
 - id: other
   name: Other
-- id: alliance
-  name: Alliance
+- id: alliances
+  name: Alliances
 - id: mixing-management
   name: Mixing management
 - id: data-management
@@ -48,5 +48,7 @@
   name: Donate
 - id: rd
   name: R&D
-- id: mixing-services
+- id: mixing-service
   name: Mixing services
+- id: node
+  name: Node
diff --git a/utils/test.js b/utils/test.js
index 2831f379..a95b27db 100644
--- a/utils/test.js
+++ b/utils/test.js
@@ -27,19 +27,28 @@ const matrix = {
 const schemaDir = "./schema";
 const schemas = await loadSchemas();
 
+schemas.project.properties.categories.items.enum = w3pd.data.categories.map(c => c.id)
+
 for (const col of Object.keys(w3pd.data)) {
   const validator = ajv.compile(schemas[matrix[col]]);
+  const ids = []
 
   for (const item of w3pd.data[col]) {
+    const testName = `${col}/${item.id} ` + (col === 'projects' ? `[${item.categories?.join(', ')}]` : '')
 
-    if(Object.keys(item).length === 1) {
-      continue
+    if (ids.includes(item.id)) {
+      Deno.test(testName + ' (id-duplicates)', () => {
+          throw { message: `Duplicate project id="${item.id}"` }
+      });      
     }
 
-    Deno.test(`${col}/${item.id} ` + (col === 'projects' ? `[${item.categories?.join(', ')}]` : ''), () => {
-      if (!validator(item)) {
-        throw validator.errors;
-      }
-    });
+    if(Object.keys(item).length > 1) {
+      Deno.test(testName + ' (schema)', () => {
+        if (!validator(item)) {
+          throw validator.errors;
+        }
+      });
+    }
+    ids.push(item.id)
   }
 }
diff --git a/utils/w3pdata.js b/utils/w3pdata.js
index b73bd465..34e18596 100644
--- a/utils/w3pdata.js
+++ b/utils/w3pdata.js
@@ -27,12 +27,7 @@ export class W3PData {
             }
             const pDir = `${catDir}/${pd.name}`;
             const indexFn = `${pDir}/index.yaml`;
-            try {
-              await Deno.stat(indexFn);
-            } catch(e) {
-              continue
-            }
-
+            
             const index = yaml.load(
               await Deno.readTextFile(indexFn),
             );