diff --git a/src/main/java/fr/abes/bestppn/kafka/KafkaWorkInProgress.java b/src/main/java/fr/abes/bestppn/kafka/KafkaWorkInProgress.java
index 08b6031..ad2f10a 100644
--- a/src/main/java/fr/abes/bestppn/kafka/KafkaWorkInProgress.java
+++ b/src/main/java/fr/abes/bestppn/kafka/KafkaWorkInProgress.java
@@ -4,15 +4,12 @@
 import fr.abes.bestppn.model.dto.PackageKbartDto;
 import fr.abes.bestppn.model.dto.kafka.LigneKbartDto;
 import fr.abes.bestppn.model.entity.ExecutionReport;
-import jakarta.annotation.PreDestroy;
 import lombok.Getter;
 import lombok.Setter;
 import lombok.extern.slf4j.Slf4j;
 
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.concurrent.Semaphore;
+import java.sql.Timestamp;
+import java.util.*;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -44,6 +41,8 @@ public class KafkaWorkInProgress {
 
     private final List<LigneKbartDto> ppnFromKbartToCreate;
 
+    private long timestamp;
+
 
     public KafkaWorkInProgress(boolean isForced, boolean isBypassed) {
         this.isForced = isForced;
@@ -55,6 +54,7 @@ public KafkaWorkInProgress(boolean isForced, boolean isBypassed) {
         this.kbartToSend = Collections.synchronizedList(new ArrayList<>());
         this.ppnToCreate = Collections.synchronizedList(new ArrayList<>());
         this.ppnFromKbartToCreate = Collections.synchronizedList(new ArrayList<>());
+        this.timestamp = Calendar.getInstance().getTimeInMillis();
     }
 
     public void incrementThreads() {
diff --git a/src/main/java/fr/abes/bestppn/kafka/TopicConsumer.java b/src/main/java/fr/abes/bestppn/kafka/TopicConsumer.java
index 6f578ff..049608c 100644
--- a/src/main/java/fr/abes/bestppn/kafka/TopicConsumer.java
+++ b/src/main/java/fr/abes/bestppn/kafka/TopicConsumer.java
@@ -11,18 +11,22 @@
 import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.consumer.ConsumerRecord;
 import org.apache.logging.log4j.ThreadContext;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.kafka.annotation.KafkaListener;
 import org.springframework.stereotype.Service;
 import org.springframework.web.client.RestClientException;
 
 import java.io.IOException;
 import java.net.URISyntaxException;
+import java.util.Calendar;
 import java.util.Map;
 import java.util.concurrent.ExecutionException;
 
 @Slf4j
 @Service
 public class TopicConsumer {
+    @Value("${delay.max.topic}")
+    private int maxDelayBetweenMessage;
     private final ObjectMapper mapper;
     private final KbartService service;
 
@@ -50,6 +54,11 @@ public TopicConsumer(ObjectMapper mapper, KbartService service, EmailService ema
     @KafkaListener(topics = {"${topic.name.source.kbart}"}, groupId = "${topic.groupid.source.kbart}", containerFactory = "kafkaKbartListenerContainerFactory", concurrency = "${abes.kafka.concurrency.nbThread}")
     public void kbartFromkafkaListener(ConsumerRecord<String, String> ligneKbart) {
         String filename = extractFilenameFromKey(ligneKbart.key());
+        long now = Calendar.getInstance().getTimeInMillis();
+        //si on a pas reçu de message depuis plus de maxDelayBetweenMessage
+        if (this.workInProgress.get(filename).getTimestamp() + maxDelayBetweenMessage < now) {
+            workInProgress.remove(filename);
+        }
         if (!this.workInProgress.containsKey(filename)) {
             //nouveau fichier trouvé dans le topic, on initialise les variables partagées
             workInProgress.put(filename, new KafkaWorkInProgress(ligneKbart.key().contains("_FORCE"), ligneKbart.key().contains("_BYPASS")));
diff --git a/src/main/java/fr/abes/bestppn/service/KbartService.java b/src/main/java/fr/abes/bestppn/service/KbartService.java
index b077254..b8a4f21 100644
--- a/src/main/java/fr/abes/bestppn/service/KbartService.java
+++ b/src/main/java/fr/abes/bestppn/service/KbartService.java
@@ -14,6 +14,7 @@
 
 import java.io.IOException;
 import java.net.URISyntaxException;
+import java.util.Calendar;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
@@ -64,6 +65,8 @@ public void processConsumerRecord(LigneKbartDto ligneFromKafka, String providerN
             }
         }
         workInProgress.get(filename).addKbartToSend(ligneFromKafka);
+        //quel que soit le résultat du calcul du best ppn on met à jour le timestamp correspondant à la consommation du message
+        workInProgress.get(filename).setTimestamp(Calendar.getInstance().getTimeInMillis());
     }
 
     public void commitDatas(String providerName, String filename) throws IllegalPackageException, IllegalDateException, ExecutionException, InterruptedException, IOException, IllegalProviderException {
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 45283e9..9111e36 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -32,6 +32,8 @@ topic.name.source.nbLines=bacon.kbart.toload.nbLines
 topic.name.target.kbart.bypass.toload=bacon.kbart.bypass.toload
 
 spring.jpa.open-in-view=false
+# 5 minutes en ms
+delay.max.topic=300000
 
 # SpringDoc Swagger
 springdoc.swagger-ui.path=/convergence-documentation