diff --git a/GPT_SoVITS/TTS_infer_pack/TTS.py b/GPT_SoVITS/TTS_infer_pack/TTS.py
index da6a6dfe..60c15729 100644
--- a/GPT_SoVITS/TTS_infer_pack/TTS.py
+++ b/GPT_SoVITS/TTS_infer_pack/TTS.py
@@ -306,7 +306,7 @@ class TTS_Config:
         assert isinstance(configs, dict)
         version = configs.get("version", "v2").lower()
         assert version in ["v1", "v2", "v3", "v4", "v2pro", "v2proplus"]
-        self.default_configs[version] = configs.get(version, self.default_configs[version])
+        self.default_configs[version] = configs.get(version, self.default_configs.get(version, {}))
         self.configs: dict = configs.get("custom", deepcopy(self.default_configs[version]))
 
         self.device = self.configs.get("device", torch.device("cpu"))