diff --git a/Directory.Packages.props b/Directory.Packages.props
index b54137363c7..2a88b69da3e 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -7,6 +7,8 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
     <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
     <CentralPackageVersionOverrideEnabled>true</CentralPackageVersionOverrideEnabled>
+    <!-- Do not warn for missing source mappings -->
+    <NoWarn>$(NoWarn);NU1507</NoWarn>
   </PropertyGroup>
   <ItemGroup>
     <!-- core dependencies-->
diff --git a/NuGet.config b/NuGet.config
index 21b746fb5ac..d1a8a417e43 100644
--- a/NuGet.config
+++ b/NuGet.config
@@ -16,32 +16,6 @@
     <!-- Used for the Rich Navigation indexing task -->
     <add key="richnav" value="https://pkgs.dev.azure.com/azure-public/vside/_packaging/vs-buildservices/nuget/v3/index.json" />
   </packageSources>
-  <packageSourceMapping>
-    <packageSource key="dotnet9-transport">
-      <package pattern="*" />
-    </packageSource>
-    <packageSource key="dotnet9">
-      <package pattern="*" />
-    </packageSource>
-    <packageSource key="dotnet-public">
-      <package pattern="*" />
-    </packageSource>
-    <packageSource key="dotnet-eng">
-      <package pattern="*" />
-    </packageSource>
-    <packageSource key="dotnet-tools">
-      <package pattern="*" />
-    </packageSource>
-    <packageSource key="dotnet8-transport">
-      <package pattern="*" />
-    </packageSource>
-    <packageSource key="dotnet8">
-      <package pattern="*" />
-    </packageSource>
-    <packageSource key="richnav">
-      <package pattern="*" />
-    </packageSource>
-  </packageSourceMapping>
   <disabledPackageSources>
     <clear />
     <!--Begin: Package sources managed by Dependency Flow automation. Do not edit the sources below.-->
diff --git a/src/EFCore.Analyzers/EFCore.Analyzers.csproj b/src/EFCore.Analyzers/EFCore.Analyzers.csproj
index 90c28c46a19..3a73644bec0 100644
--- a/src/EFCore.Analyzers/EFCore.Analyzers.csproj
+++ b/src/EFCore.Analyzers/EFCore.Analyzers.csproj
@@ -10,7 +10,7 @@
     <CodeAnalysisRuleSet>$(MSBuildThisFileDirectory)..\..\rulesets\EFCore.noxmldocs.ruleset</CodeAnalysisRuleSet>
     <ImplicitUsings>true</ImplicitUsings>
     <EnforceExtendedAnalyzerRules>true</EnforceExtendedAnalyzerRules>
-    <NoWarn>NU5128</NoWarn>
+    <NoWarn>$(NoWarn);NU5128</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/EFCore.Design/EFCore.Design.csproj b/src/EFCore.Design/EFCore.Design.csproj
index 9fb32f5f722..caae39e9f4f 100644
--- a/src/EFCore.Design/EFCore.Design.csproj
+++ b/src/EFCore.Design/EFCore.Design.csproj
@@ -8,7 +8,7 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <DevelopmentDependency>true</DevelopmentDependency>
     <ImplicitUsings>true</ImplicitUsings>
-    <NoWarn>EF9100</NoWarn> <!-- Precompiled query is experimental -->
+    <NoWarn>$(NoWarn);EF9100</NoWarn> <!-- Precompiled query is experimental -->
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/EFCore.SqlServer/EFCore.SqlServer.csproj b/src/EFCore.SqlServer/EFCore.SqlServer.csproj
index 9c55dc8c9bf..fff89e95202 100644
--- a/src/EFCore.SqlServer/EFCore.SqlServer.csproj
+++ b/src/EFCore.SqlServer/EFCore.SqlServer.csproj
@@ -9,7 +9,7 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>$(PackageTags);SQL Server</PackageTags>
     <ImplicitUsings>true</ImplicitUsings>
-    <NoWarn>EF9100</NoWarn> <!-- Precompiled query is experimental -->
+    <NoWarn>$(NoWarn);EF9100</NoWarn> <!-- Precompiled query is experimental -->
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/EFCore.Sqlite.Core/EFCore.Sqlite.Core.csproj b/src/EFCore.Sqlite.Core/EFCore.Sqlite.Core.csproj
index ce21537a399..b916b92851a 100644
--- a/src/EFCore.Sqlite.Core/EFCore.Sqlite.Core.csproj
+++ b/src/EFCore.Sqlite.Core/EFCore.Sqlite.Core.csproj
@@ -10,7 +10,7 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>$(PackageTags);SQLite</PackageTags>
     <ImplicitUsings>true</ImplicitUsings>
-    <NoWarn>EF9100</NoWarn> <!-- Precompiled query is experimental -->
+    <NoWarn>$(NoWarn);EF9100</NoWarn> <!-- Precompiled query is experimental -->
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/EFCore.Tasks/EFCore.Tasks.csproj b/src/EFCore.Tasks/EFCore.Tasks.csproj
index a84046e613c..eb72b2ae76a 100644
--- a/src/EFCore.Tasks/EFCore.Tasks.csproj
+++ b/src/EFCore.Tasks/EFCore.Tasks.csproj
@@ -10,7 +10,7 @@
     <GenerateDependencyFile>true</GenerateDependencyFile>
     <SuppressDependenciesWhenPacking>true</SuppressDependenciesWhenPacking>
     <DevelopmentDependency>true</DevelopmentDependency>
-    <NoWarn>NU5100;NU5128</NoWarn>
+    <NoWarn>$(NoWarn);NU5100;NU5128</NoWarn>
     <ImplicitUsings>true</ImplicitUsings>
     <CodeAnalysisRuleSet>$(MSBuildThisFileDirectory)..\..\rulesets\EFCore.noxmldocs.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>