diff --git a/src/so_vits_svc_fork/utils.py b/src/so_vits_svc_fork/utils.py
index 6efb8321..02e63530 100644
--- a/src/so_vits_svc_fork/utils.py
+++ b/src/so_vits_svc_fork/utils.py
@@ -452,14 +452,18 @@ def clean_checkpoints(
                           False -> lexicographically delete ckpts
     """
     path_to_models = Path(path_to_models)
-    name_key = lambda p: int(re.match(r"._(\d+)\.pth", p.name).group(1))
+    name_key = lambda p: int(re.match(r"._(\d+)", p.stem).group(1))
     time_key = lambda p: p.stat().st_mtime
     models_sorted = sorted(
-        path_to_models.glob(r"._(\d+).pth"), key=time_key if sort_by_time else name_key
+        filter(
+            lambda p: (p.is_file() and re.match(r"._\d+", p.stem)),
+            path_to_models.glob("*.pth"),
+        ),
+        key=time_key if sort_by_time else name_key,
     )
-    models_sorted_grouped = groupby(models_sorted, lambda p: p.name[0])
+    models_sorted_grouped = groupby(models_sorted, lambda p: p.stem[0])
     for k, g in models_sorted_grouped:
-        to_dels = list(g)[n_ckpts_to_keep:]
+        to_dels = list(g)[:-n_ckpts_to_keep]
         for to_del in to_dels:
             if to_del.stem.endswith("_0"):
                 continue