diff --git a/src/scheduler/unpacking_scheduler.py b/src/scheduler/unpacking_scheduler.py
index beb28851d..ca1bb2077 100644
--- a/src/scheduler/unpacking_scheduler.py
+++ b/src/scheduler/unpacking_scheduler.py
@@ -22,6 +22,7 @@
 )
 from objects.firmware import Firmware
 from storage.db_interface_backend import BackendDbInterface
+from storage.db_interface_base import DbInterfaceError
 from unpacker.extraction_container import ExtractionContainer
 from unpacker.unpack import Unpacker
 from unpacker.unpack_base import ExtractionError
@@ -205,8 +206,12 @@ def work_thread(self, task: FileObject, container: ExtractionContainer):
             logging.info(f'Unpacking completed: {task.uid} (extracted files: {len(extracted_objects)})')
             # each worker needs its own interface because connections are not thread-safe
             db_interface = self.db_interface()
-            db_interface.add_object(task)  # save FO before submitting to analysis scheduler
-            self.post_unpack(task)
+            try:
+                db_interface.add_object(task)  # save FO before submitting to analysis scheduler
+                self.post_unpack(task)
+            except DbInterfaceError as error:
+                logging.error(str(error))
+                extracted_objects = []
             self._update_currently_unpacked(task, extracted_objects, db_interface)
             self._schedule_extracted_files(extracted_objects)
 
diff --git a/src/storage/db_interface_backend.py b/src/storage/db_interface_backend.py
index 147251887..29f7afbdf 100644
--- a/src/storage/db_interface_backend.py
+++ b/src/storage/db_interface_backend.py
@@ -149,6 +149,14 @@ def add_child_to_parent(self, parent_uid: str, child_uid: str):
 
     def update_object(self, fw_object: FileObject):
         if isinstance(fw_object, Firmware):
+            if not self.is_firmware(fw_object.uid):
+                # special case: Trying to upload a file as firmware that is already in the DB as part of another
+                # firmware. This is currently not possible and will likely cause errors
+                parent_fw = self.get_parent_fw(fw_object.uid)
+                raise DbInterfaceError(
+                    'Cannot upload file as firmware that is part of another firmware. '
+                    f'The file you are trying to upload is already part of the following firmware images: {parent_fw}'
+                )
             self.update_firmware(fw_object)
         self.update_file_object(fw_object)
 
diff --git a/src/test/integration/storage/test_db_interface_backend.py b/src/test/integration/storage/test_db_interface_backend.py
index 555915f90..ec143e8e7 100644
--- a/src/test/integration/storage/test_db_interface_backend.py
+++ b/src/test/integration/storage/test_db_interface_backend.py
@@ -2,6 +2,7 @@
 
 import pytest
 
+from storage.db_interface_base import DbInterfaceError
 from test.common_helper import create_test_file_object, create_test_firmware
 
 from .helper import TEST_FO, TEST_FW, create_fw_with_child_fo, create_fw_with_parent_and_child, add_included_file
@@ -143,6 +144,17 @@ def test_update_duplicate_same_fw(backend_db, frontend_db):
     assert db_fo.parents == {fw.uid}
 
 
+def test_update_duplicate_file_as_fw(backend_db):
+    # special case: trying to upload a file as FW that is already in the DB as part of another FW -> should cause error
+    fo, fw = create_fw_with_child_fo()
+    backend_db.insert_multiple_objects(fw, fo)
+    fw2 = create_test_firmware()
+    fw2.uid = fo.uid
+
+    with pytest.raises(DbInterfaceError):
+        backend_db.add_object(fw2)
+
+
 def test_analysis_exists(backend_db):
     assert backend_db.analysis_exists(TEST_FO.uid, 'file_type') is False
     backend_db.insert_file_object(TEST_FO)