diff --git a/Logic/Osm/ChangesetHandler.ts b/Logic/Osm/ChangesetHandler.ts
index 5b07a0faf..1861afa3a 100644
--- a/Logic/Osm/ChangesetHandler.ts
+++ b/Logic/Osm/ChangesetHandler.ts
@@ -50,6 +50,22 @@ export class ChangesetHandler {
 
     }
 
+    /**
+     * Creates a new list which contains every key at most once
+     */
+    public static removeDuplicateMetaTags(extraMetaTags: ChangesetTag[]): ChangesetTag[]{
+        const r : ChangesetTag[] = []
+        const seen = new Set<string>()
+        for (const extraMetaTag of extraMetaTags) {
+            if(seen.has(extraMetaTag.key)){
+                continue
+            }
+            r.push(extraMetaTag)
+            seen.add(extraMetaTag.key)
+        }
+        return r
+    }
+
     /**
      * Inplace rewrite of extraMetaTags
      * If the metatags contain a special motivation of the format "<change-type>:node/-<number>", this method will rewrite this negative number to the actual ID
@@ -95,7 +111,7 @@ export class ChangesetHandler {
         }
         
         extraMetaTags = [...extraMetaTags, ...this.defaultChangesetTags()]
-
+        extraMetaTags = ChangesetHandler.removeDuplicateMetaTags(extraMetaTags)
         if (this.userDetails.data.csCount == 0) {
             // The user became a contributor!
             this.userDetails.data.csCount = 1;
@@ -316,6 +332,7 @@ export class ChangesetHandler {
     private async UpdateTags(
         csId: number,
         tags: ChangesetTag[]) {
+        tags = ChangesetHandler.removeDuplicateMetaTags(tags)
 
         console.trace("Updating tags of " + csId)
         const self = this;
diff --git a/Models/Constants.ts b/Models/Constants.ts
index a1b3e2605..bba84fb33 100644
--- a/Models/Constants.ts
+++ b/Models/Constants.ts
@@ -2,7 +2,7 @@ import {Utils} from "../Utils";
 
 export default class Constants {
 
-    public static vNumber = "0.16.7";
+    public static vNumber = "0.16.8";
     
     public static ImgurApiKey = '7070e7167f0a25a'
     public static readonly mapillary_client_token_v4 = "MLY|4441509239301885|b40ad2d3ea105435bd40c7e76993ae85"