diff --git a/fix_tokenizer.py b/fix_tokenizer.py
index 9556ea6..8e012a3 100644
--- a/fix_tokenizer.py
+++ b/fix_tokenizer.py
@@ -37,6 +37,8 @@ else:
 # ===== 自动修复策略 =====
 if typ == "fast":
     cfg["tokenizer_class"] = "PreTrainedTokenizerFast"
+    cfg["from_slow"] = False
+    cfg.pop("backend", None)
 
 elif typ == "sentencepiece":
     cfg["tokenizer_class"] = "LlamaTokenizer"