fix crash again

llm_server/routes/request_handler.py

@@ -3,7 +3,6 @@ import time
 from typing import Union
 
 from flask import jsonify
-from requests.exceptions import InvalidJSONError
 
 from llm_server import opts
 from llm_server.database import log_prompt
@@ -75,7 +74,7 @@ class OobaRequestHandler:
         # Fix bug on text-generation-inference
         # https://github.com/huggingface/text-generation-inference/issues/929
         if opts.mode == 'hf-textgen' and self.parameters.get('typical_p', 0) > 0.998:
-            self.parameters['typical_p'] = 0.998
+            self.request_json_body['typical_p'] = 0.998
 
         request_valid, invalid_request_err_msg = self.validate_request()
         params_valid, invalid_params_err_msg = self.backend.validate_params(self.parameters)