diff --git a/schemas/2023-03-01-preview/Microsoft.DBforPostgreSQL.json b/schemas/2023-03-01-preview/Microsoft.DBforPostgreSQL.json
index b9b7533265..023c8f32d6 100644
--- a/schemas/2023-03-01-preview/Microsoft.DBforPostgreSQL.json
+++ b/schemas/2023-03-01-preview/Microsoft.DBforPostgreSQL.json
@@ -1383,7 +1383,18 @@
           ],
           "description": "Flag to enable / disable Storage Auto grow for flexible server."
         },
-        "iopsTier": {
+        "storageSizeGB": {
+          "oneOf": [
+            {
+              "type": "integer"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Max storage allowed for a server."
+        },
+        "tier": {
           "oneOf": [
             {
               "type": "string",
@@ -1409,17 +1420,6 @@
             }
           ],
           "description": "Name of storage tier for IOPS."
-        },
-        "storageSizeGB": {
-          "oneOf": [
-            {
-              "type": "integer"
-            },
-            {
-              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
-            }
-          ],
-          "description": "Max storage allowed for a server."
         }
       },
       "description": "Storage properties of a server"