diff --git a/backend/src/federation/validateCommunities.ts b/backend/src/federation/validateCommunities.ts
index 91c6ee724..f4b52c5dc 100644
--- a/backend/src/federation/validateCommunities.ts
+++ b/backend/src/federation/validateCommunities.ts
@@ -10,10 +10,13 @@ import { backendLogger as logger } from '@/server/logger'
 
 import { ApiVersionType } from './enum/apiVersionType'
 
-export function startValidateCommunities(timerInterval: number): void {
+export async function startValidateCommunities(timerInterval: number): Promise<void> {
   logger.info(
     `Federation: startValidateCommunities loop with an interval of ${timerInterval} ms...`,
   )
+  // delete all foreign federated community entries to avoid increasing validation efforts and log-files
+  await DbFederatedCommunity.delete({ foreign: true })
+
   // TODO: replace the timer-loop by an event-based communication to verify announced foreign communities
   // better to use setTimeout twice than setInterval once -> see https://javascript.info/settimeout-setinterval
   setTimeout(function run() {