diff --git a/src/loaders/RepositoryDataLoader.ts b/src/loaders/RepositoryDataLoader.ts
index c4996f1..efe4298 100644
--- a/src/loaders/RepositoryDataLoader.ts
+++ b/src/loaders/RepositoryDataLoader.ts
@@ -48,6 +48,7 @@ export class RepositoryDataLoader {
     if (!this.shouldBeRunning) return;
 
     try {
+      await this.clearAllData();
       await this.fetchAndUpdateSystemData();
       await this.fetchAndUpdateRouteDataForExistingSystems();
       await this.fetchAndUpdateStopAndPolylineDataForRoutesInExistingSystems();
@@ -60,6 +61,15 @@ export class RepositoryDataLoader {
     this.timer = setTimeout(this.startFetchDataAndUpdate, timeout);
   }
 
+  private async clearAllData() {
+    await this.repository.clearRouteData();
+    await this.repository.clearSystemData();
+    await this.repository.clearEtaData();
+    await this.repository.clearStopData();
+    await this.repository.clearOrderedStopData();
+    await this.repository.clearShuttleData();
+  }
+
   private async fetchAndUpdateSystemData() {
     const params = {
       getSystems: "2",