Fix: check if file is not empty and try importing it

backend/apps/archive/management/commands/import_data.py

@@ -117,7 +117,7 @@ class BaseImporter(ABC):
                 hash_blake3=file_hash
             )
 
-            if created:
+            if created or not file_instance.file:
                 with open(file_path, "rb") as file:
                     file_instance.file.save(hash_file_name, file)