diff --git a/core/dbt/contracts/graph/semantic_manifest.py b/core/dbt/contracts/graph/semantic_manifest.py
index 4587a9dc4a6..76c87cac13b 100644
--- a/core/dbt/contracts/graph/semantic_manifest.py
+++ b/core/dbt/contracts/graph/semantic_manifest.py
@@ -59,7 +59,7 @@ def validate(self) -> bool:
 
         semantic_manifest = self._get_pydantic_semantic_manifest()
 
-        if get_flags().allow_legacy_mf_cumulative_type_params is False:
+        if get_flags().require_nested_cumulative_type_params is False:
             metrics_using_old_params: Set[str] = set()
             for metric in semantic_manifest.metrics or []:
                 for field in ("window", "grain_to_date"):
diff --git a/core/dbt/contracts/project.py b/core/dbt/contracts/project.py
index 88464ca5d72..1e41879556c 100644
--- a/core/dbt/contracts/project.py
+++ b/core/dbt/contracts/project.py
@@ -345,7 +345,7 @@ class ProjectFlags(ExtensibleDbtClassMixin):
     state_modified_compare_more_unrendered_values: bool = False
     state_modified_compare_vars: bool = False
     require_yaml_configuration_for_mf_time_spines: bool = False
-    allow_legacy_mf_cumulative_type_params: bool = False
+    require_nested_cumulative_type_params: bool = False
 
     @property
     def project_only_flags(self) -> Dict[str, Any]:
@@ -357,7 +357,7 @@ def project_only_flags(self) -> Dict[str, Any]:
             "state_modified_compare_more_unrendered_values": self.state_modified_compare_more_unrendered_values,
             "state_modified_compare_vars": self.state_modified_compare_vars,
             "require_yaml_configuration_for_mf_time_spines": self.require_yaml_configuration_for_mf_time_spines,
-            "allow_legacy_mf_cumulative_type_params": self.allow_legacy_mf_cumulative_type_params,
+            "require_nested_cumulative_type_params": self.require_nested_cumulative_type_params,
         }
 
 
diff --git a/tests/unit/contracts/graph/test_semantic_manifest.py b/tests/unit/contracts/graph/test_semantic_manifest.py
index 82b551de7e9..ba8c731c497 100644
--- a/tests/unit/contracts/graph/test_semantic_manifest.py
+++ b/tests/unit/contracts/graph/test_semantic_manifest.py
@@ -92,7 +92,7 @@ def test_deprecate_cumulative_type_params(self, manifest: Manifest, metric: Metr
         with patch("dbt.contracts.graph.semantic_manifest.get_flags") as patched_get_flags, patch(
             "dbt.contracts.graph.semantic_manifest.deprecations"
         ) as patched_deprecations:
-            patched_get_flags.return_value.allow_legacy_mf_cumulative_type_params = False
+            patched_get_flags.return_value.require_nested_cumulative_type_params = False
             manifest.metrics[metric.unique_id] = metric
             sm_manifest = SemanticManifest(manifest)
             assert sm_manifest.validate()