fix

app/rag.py

@@ -19,10 +19,8 @@ class ChatPDF:
             model="qwen:1.8b",
             keep_alive=-1,
             temperature=0,
-            max_tokens=512,
             num_predict=512,
             repeat_penalty=1.3,
-            metadata={"num_predict":512,"max_tokens":512},
         )
 
         self.text_splitter = RecursiveCharacterTextSplitter(chunk_size=2048, chunk_overlap=128)