diff --git a/app/Services/Pacs/Sync/Pipes/InsertStudies.php b/app/Services/Pacs/Sync/Pipes/InsertStudies.php
index f52f2df..e9b6532 100644
--- a/app/Services/Pacs/Sync/Pipes/InsertStudies.php
+++ b/app/Services/Pacs/Sync/Pipes/InsertStudies.php
@@ -20,6 +20,10 @@ public function __invoke(StudiesSync $sync, Closure $next): StudiesSync
             }
 
             $payload = $sync->transformData($study);
+            if (empty($payload)) {
+                continue;
+            }
+
             $row = Study::create($payload['study']);
             $payload['details']['study_id'] = $row->id;
             $payload['details']['orthanc_uuid'] = $orthanc_uuid;
diff --git a/app/Services/Pacs/Sync/Pipes/UpdateStudies.php b/app/Services/Pacs/Sync/Pipes/UpdateStudies.php
index 93e6f38..4145c6f 100644
--- a/app/Services/Pacs/Sync/Pipes/UpdateStudies.php
+++ b/app/Services/Pacs/Sync/Pipes/UpdateStudies.php
@@ -25,6 +25,10 @@ public function __invoke(StudiesSync $sync, Closure $next): StudiesSync
             }
 
             $payload = $sync->transformData($study);
+            if (empty($payload)) {
+                continue;
+            }
+
             unset($payload['study']['orthanc_uuid']);
             $payload['study']['updated_at'] = now();
             DB::table('studies')->where('id', $study_id)->update($payload['study']);