diff --git a/src/main/java/adt/mainnode/repository/SnapshotRepository.java b/src/main/java/adt/mainnode/repository/SnapshotRepository.java
index cc81566cc078ed68b9df625cef3b7a6c01e0c4a6..eb0d26282ce17f082f053193b2afe6b24edcedde 100644
--- a/src/main/java/adt/mainnode/repository/SnapshotRepository.java
+++ b/src/main/java/adt/mainnode/repository/SnapshotRepository.java
@@ -11,5 +11,6 @@ public interface SnapshotRepository extends JpaRepository<Snapshot, String> {
     Snapshot findBySnapshotId(String snapshotId);
 
     Snapshot findTopByVlanNameOrderByTimestampDistNodeEndDesc(String vlanName);
+    Snapshot findTopByVlanNameAndDiscoveryMethodOrderByTimestampDistNodeEndDesc (String vlanName, String discoveryMethod);
 
 }
diff --git a/src/main/java/adt/mainnode/service/AssetService.java b/src/main/java/adt/mainnode/service/AssetService.java
index 423e76b84023e094e05f9cd35169c9f2b4108993..48740618954ca3f8dd5eb828e4405efe22050f8e 100644
--- a/src/main/java/adt/mainnode/service/AssetService.java
+++ b/src/main/java/adt/mainnode/service/AssetService.java
@@ -91,9 +91,27 @@ public class AssetService {
 
         List<ScanInfoDto> allScans = asset.getScanInfo();
 
+        boolean nueva_snapshot = true;
+        String generatedHash = null;
+        Snapshot snapshot = null;
+        if (asset.getDiscoveryMethod().equals("sniffing")){
+                Snapshot snapshot_scan = snapshotRepository.findTopByVlanNameAndDiscoveryMethodOrderByTimestampDistNodeEndDesc(allScans.get(0).getVlanName(),"scan");
+                Snapshot snapshot_sniffing = snapshotRepository.findTopByVlanNameAndDiscoveryMethodOrderByTimestampDistNodeEndDesc(allScans.get(0).getVlanName(),"sniffing");
+                if (snapshot_scan != null && snapshot_sniffing != null && snapshot_scan.getTimestamp_mainNode().getTime() < snapshot_sniffing.getTimestamp_mainNode().getTime() ){
+                    // Utilizas la snapshot_sniffing que ya tienes y la actualizas
+                    generatedHash = snapshot_sniffing.getSnapshotId();
+                    nueva_snapshot = false;
+                    snapshot = snapshot_sniffing;
+                }
+        }
         Date mainNode_timestamp = new Date();
-        String generatedHash = DigestUtils.sha256Hex(DigestUtils.sha256Hex(mainNode_timestamp.toString()) + DigestUtils.sha256Hex(allScans.get(0).getIniTimestampScan().toString()) + DigestUtils.sha256Hex(allScans.get(0).getEndTimestampScan().toString()) + System.currentTimeMillis());
+        if (nueva_snapshot) {
+            generatedHash = DigestUtils.sha256Hex(DigestUtils.sha256Hex(mainNode_timestamp.toString()) +
+                    DigestUtils.sha256Hex(allScans.get(0).getIniTimestampScan().toString()) +
+                    DigestUtils.sha256Hex(allScans.get(0).getEndTimestampScan().toString()) +
+                    System.currentTimeMillis());
 
+        }
         SnapshotChange snapChange = evaluateChanges(allScans, mainNode_timestamp, asset.getDiscoveryMethod());
 
         // TODO: retrieve from web form instead of hard-coding it here
@@ -118,7 +136,7 @@ public class AssetService {
             Node node = nodeRepository.findByNodeId(credential.getName());
             log.info("let me {}", scanInfo);
             SnapshotIdentity snapshotIdentity = SnapshotIdentity.createSnapshotIdentity(scanInfo.getVlanName(), node.getNodeId(), scanInfo.getSnapshotId());
-            Snapshot snapshot = Snapshot.createSnapshot(scanInfo, snapshotIdentity, asset.getDiscoveryMethod());
+            if (nueva_snapshot) snapshot = Snapshot.createSnapshot(scanInfo, snapshotIdentity, asset.getDiscoveryMethod());
             //////
 
             // CREATING HOST AND PORT ENTITIES FROM THE RECEIVED DTO
@@ -132,9 +150,10 @@ public class AssetService {
 
                 hosts.add(host);
 
+                String finalGeneratedHash = generatedHash;
                 List<Port> ports = host_dtos.get(i).getPorts().parallelStream()
                         .map(portDto -> {
-                            PortIdentity portIdentity = PortIdentity.createPortIdentity(portDto.getPortNumber(), host.getIp(), host.getVlanName(), generatedHash);
+                            PortIdentity portIdentity = PortIdentity.createPortIdentity(portDto.getPortNumber(), host.getIp(), host.getVlanName(), finalGeneratedHash);
                             return Port.createPort(portIdentity, portDto);
                         })
                         .collect(Collectors.toList());
@@ -144,8 +163,9 @@ public class AssetService {
 
             }
             //////
-
-            snapshotRepository.save(snapshot);
+            if (nueva_snapshot) {
+                snapshotRepository.save(snapshot);
+            }
             scanInfoRepository.save(scanInfo);
 
             // WRITING SCAN INFO ENTITY TO FILE FOR ITS POSTERIOR UPLOAD TO VIRTUOSO'S DB
@@ -189,9 +209,9 @@ public class AssetService {
 
                 t.printStackTrace();
             }
-            //////
+                //////
 
-        } // End of initial for
+            } // End of initial for
 
     } // End of method