diff --git a/nodes.py b/nodes.py
index 25ea4db8..8aca2533 100644
--- a/nodes.py
+++ b/nodes.py
@@ -255,8 +255,8 @@ class LorasEndpoint:
                 local_metadata['base_model'] = civitai_metadata.get('baseModel')
                 
                 # 4. 下载预览图
-                # Check if existing preview is valid
-                if not local_metadata.get('preview_url') or not os.path.join(self.loras_root, local_metadata['preview_url'].replace('/', os.sep)):
+                # Check if existing preview is valid and the file exists
+                if not local_metadata.get('preview_url') or not os.path.exists(os.path.join(self.loras_root, local_metadata['preview_url'].replace('/', os.sep))):
                     first_preview = next((img for img in civitai_metadata.get('images', [])), None)
                     if first_preview:
                         
diff --git a/pyproject.toml b/pyproject.toml
index e9765b71..f0e5301e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "comfyui-lora-manager"
 description = "LoRA Manager for ComfyUI - An extension for managing LoRA models with previews and metadata integration."
-version = "0.5.1"
+version = "0.5.2"
 license = {file = "LICENSE"}
 dependencies = ["aiohttp", "jinja2", "safetensors"]