diff --git a/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-02-02/file.json b/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-02-02/file.json
index 432995183d66..324fda20841f 100644
--- a/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-02-02/file.json
+++ b/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-02-02/file.json
@@ -547,7 +547,7 @@
                                 "type": "string",
                                 "format": "date-time-rfc1123",
                                 "description": "A UTC date/time value generated by the service that indicates the time at which the response was initiated."
-                            },       
+                            },
                             "x-ms-file-permission-key": {
                                 "x-ms-client-name": "FilePermissionKey",
                                 "type": "string",
@@ -4011,7 +4011,10 @@
             "in": "header",
             "description": "Specifies the version of the operation to use for this request.",
             "required": true,
-            "type": "string"
+            "type": "string",
+            "enum": [
+              "2019-02-02"
+            ]
         },
         "ContentLength": {
             "name": "Content-Length",
diff --git a/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-07-07/file.json b/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-07-07/file.json
index 758d0c4e6b89..df0cef68856e 100644
--- a/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-07-07/file.json
+++ b/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-07-07/file.json
@@ -568,7 +568,7 @@
                                 "type": "string",
                                 "format": "date-time-rfc1123",
                                 "description": "A UTC date/time value generated by the service that indicates the time at which the response was initiated."
-                            },       
+                            },
                             "x-ms-file-permission-key": {
                                 "x-ms-client-name": "FilePermissionKey",
                                 "type": "string",
@@ -4662,7 +4662,10 @@
             "in": "header",
             "description": "Specifies the version of the operation to use for this request.",
             "required": true,
-            "type": "string"
+            "type": "string",
+            "enum": [
+              "2019-07-07"
+            ]
         },
         "ClientRequestId": {
             "name": "x-ms-client-request-id",
@@ -4801,7 +4804,7 @@
                 "name": "copy-file-smb-info"
             },
             "description": "Specifies the option to set archive attribute on a target file. True means archive attribute will be set on a target file despite attribute overrides or a source file state."
-        },  
+        },
         "DeleteSnapshots": {
             "name": "x-ms-delete-snapshots",
             "x-ms-client-name": "deleteSnapshots",
diff --git a/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-12-12/file.json b/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-12-12/file.json
index 3845ef64b58f..3c87d03b9de1 100644
--- a/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-12-12/file.json
+++ b/specification/storage/data-plane/Microsoft.FileStorage/preview/2019-12-12/file.json
@@ -587,7 +587,7 @@
                                 "type": "string",
                                 "format": "date-time-rfc1123",
                                 "description": "A UTC date/time value generated by the service that indicates the time at which the response was initiated."
-                            },       
+                            },
                             "x-ms-file-permission-key": {
                                 "x-ms-client-name": "FilePermissionKey",
                                 "type": "string",
@@ -4859,7 +4859,10 @@
             "in": "header",
             "description": "Specifies the version of the operation to use for this request.",
             "required": true,
-            "type": "string"
+            "type": "string",
+            "enum": [
+              "2019-12-12"
+            ]
         },
         "ClientRequestId": {
             "name": "x-ms-client-request-id",
diff --git a/specification/storage/data-plane/Microsoft.FileStorage/preview/2020-02-10/file.json b/specification/storage/data-plane/Microsoft.FileStorage/preview/2020-02-10/file.json
index 8344541a5c1e..bc8f583e84a5 100644
--- a/specification/storage/data-plane/Microsoft.FileStorage/preview/2020-02-10/file.json
+++ b/specification/storage/data-plane/Microsoft.FileStorage/preview/2020-02-10/file.json
@@ -1224,7 +1224,7 @@
                                 "type": "string",
                                 "format": "date-time-rfc1123",
                                 "description": "A UTC date/time value generated by the service that indicates the time at which the response was initiated."
-                            },       
+                            },
                             "x-ms-file-permission-key": {
                                 "x-ms-client-name": "FilePermissionKey",
                                 "type": "string",
@@ -5607,7 +5607,10 @@
             "in": "header",
             "description": "Specifies the version of the operation to use for this request.",
             "required": true,
-            "type": "string"
+            "type": "string",
+            "enum": [
+              "2020-02-10"
+            ]
         },
         "ClientRequestId": {
             "name": "x-ms-client-request-id",
diff --git a/specification/storage/data-plane/Microsoft.FileStorage/preview/2020-04-08/file.json b/specification/storage/data-plane/Microsoft.FileStorage/preview/2020-04-08/file.json
index 71b40cf4a867..bda663023088 100644
--- a/specification/storage/data-plane/Microsoft.FileStorage/preview/2020-04-08/file.json
+++ b/specification/storage/data-plane/Microsoft.FileStorage/preview/2020-04-08/file.json
@@ -1249,7 +1249,7 @@
                                 "type": "string",
                                 "format": "date-time-rfc1123",
                                 "description": "A UTC date/time value generated by the service that indicates the time at which the response was initiated."
-                            },       
+                            },
                             "x-ms-file-permission-key": {
                                 "x-ms-client-name": "FilePermissionKey",
                                 "type": "string",
@@ -5656,7 +5656,10 @@
             "in": "header",
             "description": "Specifies the version of the operation to use for this request.",
             "required": true,
-            "type": "string"
+            "type": "string",
+            "enum": [
+              "2020-04-08"
+            ]
         },
         "ClientRequestId": {
             "name": "x-ms-client-request-id",