diff --git a/Google.Api.Generator.Rest.Tests/GoldenTestData/Google.Apis.Contentwarehouse.v1/Google.Apis.Contentwarehouse.v1.cs b/Google.Api.Generator.Rest.Tests/GoldenTestData/Google.Apis.Contentwarehouse.v1/Google.Apis.Contentwarehouse.v1.cs
index e24d55e4..0ddc4678 100644
--- a/Google.Api.Generator.Rest.Tests/GoldenTestData/Google.Apis.Contentwarehouse.v1/Google.Apis.Contentwarehouse.v1.cs
+++ b/Google.Api.Generator.Rest.Tests/GoldenTestData/Google.Apis.Contentwarehouse.v1/Google.Apis.Contentwarehouse.v1.cs
@@ -1,4 +1,4 @@
-// Copyright 2023 Google LLC
+// Copyright 2022 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -84420,7 +84420,7 @@ public class TrawlerFetchReplyDataPartialResponse : Google.Apis.Requests.IDirect
 
         /// <summary>Any ETag seen in the headers</summary>
         [Newtonsoft.Json.JsonPropertyAttribute("ETag")]
-        public virtual string ETag { get; set; }
+        public virtual string ETag__ { get; set; }
 
         /// <summary>ID which links all partial fetches for this url</summary>
         [Newtonsoft.Json.JsonPropertyAttribute("FetchID")]
diff --git a/Google.Api.Generator.Rest.Tests/GoldenTestData/Google.Apis.Contentwarehouse.v1/Google.Apis.Contentwarehouse.v1.csproj b/Google.Api.Generator.Rest.Tests/GoldenTestData/Google.Apis.Contentwarehouse.v1/Google.Apis.Contentwarehouse.v1.csproj
index ab7c0058..0c09ff52 100644
--- a/Google.Api.Generator.Rest.Tests/GoldenTestData/Google.Apis.Contentwarehouse.v1/Google.Apis.Contentwarehouse.v1.csproj
+++ b/Google.Api.Generator.Rest.Tests/GoldenTestData/Google.Apis.Contentwarehouse.v1/Google.Apis.Contentwarehouse.v1.csproj
@@ -3,9 +3,9 @@
   <!-- nupkg information -->
   <PropertyGroup>
     <Title>Google.Apis.Contentwarehouse.v1 Client Library</Title>
-    <Version>1.62.0.3165</Version>
+    <Version>1.54.0.3165</Version>
     <Authors>Google LLC</Authors>
-    <Copyright>Copyright 2023 Google LLC</Copyright>
+    <Copyright>Copyright 2022 Google LLC</Copyright>
     <PackageTags>Google</PackageTags>
     <PackageProjectUrl>https://github.com/google/google-api-dotnet-client</PackageProjectUrl>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
@@ -57,8 +57,8 @@
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.2" PrivateAssets="All" />
     <PackageReference Include="ConfigureAwaitChecker.Analyzer" Version="5.0.0" PrivateAssets="All" />
     <PackageReference Include="SourceLink.Create.CommandLine" Version="2.8.3" PrivateAssets="All" />
-    <PackageReference Include="Google.Apis" Version="1.62.0" />
-    <PackageReference Include="Google.Apis.Auth" Version="1.62.0" />
+    <PackageReference Include="Google.Apis" Version="1.54.0" />
+    <PackageReference Include="Google.Apis.Auth" Version="1.54.0" />
   </ItemGroup>
 
 </Project>
diff --git a/Google.Api.Generator.Rest/Models/DataPropertyModel.cs b/Google.Api.Generator.Rest/Models/DataPropertyModel.cs
index 0ce3c138..110b8c78 100644
--- a/Google.Api.Generator.Rest/Models/DataPropertyModel.cs
+++ b/Google.Api.Generator.Rest/Models/DataPropertyModel.cs
@@ -58,6 +58,15 @@ public DataPropertyModel(DataModel parent, string name, JsonSchema schema)
             {
                 PropertyName += "Value";
             }
+            // Avoid collisions with our own ETag property in data models.
+            // Note that the standard etag field is named with all lowercase.
+            // Other etag fields named with different casing do not represent the
+            // resource version, instead they are properties of the resource itself,
+            // for instance, if the resource represents a request or response.
+            if (name != "etag" && name.Equals("etag", StringComparison.OrdinalIgnoreCase))
+            {
+                PropertyName = "ETag__";
+            }
             _schema = schema;
         }