diff --git a/kikotools/tools/model_resolution_picker/override.py b/kikotools/tools/model_resolution_picker/override.py
index 29468a1..ae35479 100644
--- a/kikotools/tools/model_resolution_picker/override.py
+++ b/kikotools/tools/model_resolution_picker/override.py
@@ -20,7 +20,7 @@ OVERRIDE_NAME = "model_resolutions.json"
 MAX_REPORTED_PROBLEMS = 3
 
 Table = Dict[str, Any]
-_CacheKey = Tuple[Path, int]
+_CacheKey = Tuple[Path, int, int]
 
 _cache: Optional[Tuple[_CacheKey, Tuple[Table, List[str]]]] = None
 
@@ -111,7 +111,8 @@ def current_table() -> Tuple[Table, List[str]]:
     if path is None:
         return SHIPPED_DATA, []
     try:
-        key: _CacheKey = (path, path.stat().st_mtime_ns)
+        stat = path.stat()
+        key: _CacheKey = (path, stat.st_mtime_ns, stat.st_size)
     except OSError:
         return SHIPPED_DATA, []
     if _cache is not None and _cache[0] == key:
diff --git a/tests/unit/tools/model_resolution_picker/test_override.py b/tests/unit/tools/model_resolution_picker/test_override.py
index d39c6bb..8859fad 100644
--- a/tests/unit/tools/model_resolution_picker/test_override.py
+++ b/tests/unit/tools/model_resolution_picker/test_override.py
@@ -251,3 +251,13 @@ def test_alias_default_is_normalised_to_its_label(tmp_path):
     config = ModelResolutionPickerNode.INPUT_TYPES()["required"]["model"][1]
     assert config["default"] == "My SDXL"
 
+
+
+def test_same_mtime_replacement_with_different_size_is_reread(tmp_path):
+    path = write_override(tmp_path, {"remove": ["SD 1.5"]})
+    old = path.stat()
+    assert families.resolve_family("SD 1.5") is None
+    path.write_text(json.dumps({"remove": ["Anima"], "default": "SDXL"}))
+    os.utime(path, ns=(old.st_atime_ns, old.st_mtime_ns))
+    assert families.resolve_family("SD 1.5") is not None
+    assert families.resolve_family("Anima") is None