diff --git a/packages/repco-core/package.json b/packages/repco-core/package.json
index ad0a3441..1b16dc3e 100644
--- a/packages/repco-core/package.json
+++ b/packages/repco-core/package.json
@@ -27,14 +27,14 @@
     "iso8601-duration": "^2.1.1",
     "level": "^8.0.0",
     "multiformats": "^11.0.2",
-    "repco-common": "*",
     "repco-activitypub": "*",
+    "repco-common": "*",
     "repco-prisma": "*",
     "rss-parser": "^3.12.0",
     "speedometer": "^1.1.0",
     "streamx": "^2.12.5",
     "uint8arrays": "^4.0.3",
-    "undici": "^5.28.0",
+    "undici": "^5.28.2",
     "vscode-uri": "^3.0.6",
     "zod": "^3.19"
   },
diff --git a/packages/repco-core/src/datasources/activitypub.ts b/packages/repco-core/src/datasources/activitypub.ts
index 362fc905..ed0c0911 100644
--- a/packages/repco-core/src/datasources/activitypub.ts
+++ b/packages/repco-core/src/datasources/activitypub.ts
@@ -633,7 +633,7 @@ export class ActivityPubDataSource
       const category =
         video.category &&
         video.category !== undefined &&
-        this._uriLink('category', video.category.identifier)
+        this._uriLink('category', 'peertube:' + video.category.name)
       category && conceptLinks.push(category)
 
       const tags =
diff --git a/packages/repco-core/src/repo/relation-finder.ts b/packages/repco-core/src/repo/relation-finder.ts
index ff858bbb..4632cfdb 100644
--- a/packages/repco-core/src/repo/relation-finder.ts
+++ b/packages/repco-core/src/repo/relation-finder.ts
@@ -43,7 +43,6 @@ export class RelationFinder {
     // check if already in map: resolve now
     if (this.uriMap.has(value.uri)) {
       value.uid = this.uriMap.get(value.uri)
-      // BUG? NOTHING HAPPENS WITH value.uid
     } else {
       this.pendingUris.add(value.uri)
       if (relation) this.relsByUri.push(value.uri, relation)
@@ -51,11 +50,18 @@ export class RelationFinder {
   }
 
   pushEntity(entity: EntityInputWithHeaders) {
-    const uid = entity.uid
+    let uid = entity.uid
     if (this.entities.has(uid)) return
     this.entities.set(uid, entity)
     if (entity.headers.EntityUris) {
       for (const uri of entity.headers.EntityUris) {
+        const foundUid = this.uriMap.get(uri)
+        if (foundUid) {
+          // if entity with the same uri already exists delete it from entities
+          this.entities.delete(uid)
+          uid = foundUid
+          break
+        }
         this.discoveredUid(uri, uid)
       }
     }