diff --git a/specification/cost-management/resource-manager/Microsoft.CostManagement/stable/2021-10-01/costmanagement.json b/specification/cost-management/resource-manager/Microsoft.CostManagement/stable/2021-10-01/costmanagement.json
index cec626b3ec3f..8c8697e3c277 100644
--- a/specification/cost-management/resource-manager/Microsoft.CostManagement/stable/2021-10-01/costmanagement.json
+++ b/specification/cost-management/resource-manager/Microsoft.CostManagement/stable/2021-10-01/costmanagement.json
@@ -1357,10 +1357,6 @@
           },
           "minItems": 2
         },
-        "not": {
-          "description": "The logical \"NOT\" expression.",
-          "$ref": "#/definitions/ReportConfigFilter"
-        },
         "dimensions": {
           "description": "Has comparison expression for a dimension",
           "$ref": "#/definitions/ReportConfigComparisonExpression"
@@ -2480,10 +2476,6 @@
           },
           "minItems": 2
         },
-        "not": {
-          "description": "The logical \"NOT\" expression.",
-          "$ref": "#/definitions/QueryFilter"
-        },
         "dimensions": {
           "description": "Has comparison expression for a dimension",
           "$ref": "#/definitions/QueryComparisonExpression"