diff --git a/py/services/download_manager.py b/py/services/download_manager.py
index 1ee46b5b..9e9a653e 100644
--- a/py/services/download_manager.py
+++ b/py/services/download_manager.py
@@ -352,7 +352,7 @@ class DownloadManager:
         base_model = version_info.get('baseModel', '')
         
         # Get author from creator data
-        author = version_info.get('creator', {}).get('username', 'Anonymous')
+        author = version_info.get('creator', {}).get('username') or 'Anonymous'
         
         # Apply mapping if available
         base_model_mappings = settings.get('base_model_path_mappings', {})
diff --git a/py/utils/utils.py b/py/utils/utils.py
index 2c67c645..e0b7c45a 100644
--- a/py/utils/utils.py
+++ b/py/utils/utils.py
@@ -156,7 +156,7 @@ def calculate_relative_path_for_model(model_data: Dict, model_type: str = 'lora'
     if civitai_data and civitai_data.get('id') is not None:
         base_model = civitai_data.get('baseModel', '')
         # Get author from civitai creator data
-        author = civitai_data.get('creator', {}).get('username', 'Anonymous')
+        author = civitai_data.get('creator', {}).get('username') or 'Anonymous'
     else:
         # Fallback to model_data fields for non-CivitAI models
         base_model = model_data.get('base_model', '')