diff --git a/semantic-conventions/src/opentelemetry/semconv/templating/compatibility.py b/semantic-conventions/src/opentelemetry/semconv/templating/compatibility.py
index be485580..03d94da8 100644
--- a/semantic-conventions/src/opentelemetry/semconv/templating/compatibility.py
+++ b/semantic-conventions/src/opentelemetry/semconv/templating/compatibility.py
@@ -73,14 +73,19 @@ def _check_attribute(self, prev: SemanticAttribute, problems: list[Problem]):
         if prev.stability == StabilityLevel.STABLE:
             self._check_attribute_type(prev, cur, problems)
 
-        if isinstance(prev.attr_type, EnumAttributeType):
+        if (
+            isinstance(prev.attr_type, EnumAttributeType)
+            and
+            # this makes mypy happy, we already checked that type is the same for stable attributes
+            isinstance(cur.attr_type, EnumAttributeType)
+        ):
             for member in prev.attr_type.members:
                 self._check_member(prev.fqn, member, cur.attr_type.members, problems)
 
     def _check_stability(
         self,
-        prev: SemanticAttribute,
-        cur: SemanticAttribute,
+        prev: StabilityLevel,
+        cur: StabilityLevel,
         signal: str,
         fqn: str,
         problems: list[Problem],
@@ -91,7 +96,7 @@ def _check_stability(
             )
 
     def _check_attribute_type(
-        self, prev: EnumAttributeType, cur: EnumAttributeType, problems: list[Problem]
+        self, prev: SemanticAttribute, cur: SemanticAttribute, problems: list[Problem]
     ):
         if isinstance(prev.attr_type, EnumAttributeType):
             if not isinstance(cur.attr_type, EnumAttributeType):
diff --git a/semantic-conventions/src/tests/semconv/templating/test_compatibility.py b/semantic-conventions/src/tests/semconv/templating/test_compatibility.py
index e428d550..70db2e3e 100644
--- a/semantic-conventions/src/tests/semconv/templating/test_compatibility.py
+++ b/semantic-conventions/src/tests/semconv/templating/test_compatibility.py
@@ -130,7 +130,7 @@ def testTypeChanged(self):
         ]
         self.assert_errors(expected_errors, problems)
 
-    def testStableEnumTypeChanged(self):
+    def testEnumTypeChanged(self):
         cur = self.parse_semconv("compat/enum_type_changed/vnext.yaml")
         prev = self.parse_semconv("compat/enum_type_changed/vprev.yaml")
         checker = CompatibilityChecker(cur, prev)
@@ -154,7 +154,7 @@ def testStableEnumTypeChanged(self):
         ]
         self.assert_errors(expected_errors, problems)
 
-    def testStableEnumValueChanged(self):
+    def testEnumValueChanged(self):
         cur = self.parse_semconv("compat/enum_value_changed/vnext.yaml")
         prev = self.parse_semconv("compat/enum_value_changed/vprev.yaml")
         checker = CompatibilityChecker(cur, prev)