diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4c2ff4300..e2a418592b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed a bug where the hash alias in typescript wasn't being generated uniformly for similar interfaces [microsoftgraph/msgraph-beta-sdk-typescript#84](https://github.com/microsoftgraph/msgraph-beta-sdk-typescript/issues/84)
 - Fixes a bug where name collisions would occur in the Typescript refiner if model name also exists with the `Interface` suffix [#4382](https://github.com/microsoft/kiota/issues/4382)
 - Fixes a bug where paths without operationIds would not be included in the generated plugins and ensured operationIds are cleaned up [#4642](https://github.com/microsoft/kiota/issues/4642)
+- Fixes a bug where models would be duplicated in some allOf scenarios [#4191](https://github.com/microsoft/kiota/issues/4191)
 - Fixes a bug where CLI Generation does not handle path parameters of type "string" and format "date", "date-time", "time", etc. [#4615](https://github.com/microsoft/kiota/issues/4615)
 
 ## [1.14.0] - 2024-05-02
diff --git a/src/Kiota.Builder/KiotaBuilder.cs b/src/Kiota.Builder/KiotaBuilder.cs
index fc1c9caac9..0275f5bd50 100644
--- a/src/Kiota.Builder/KiotaBuilder.cs
+++ b/src/Kiota.Builder/KiotaBuilder.cs
@@ -1595,12 +1595,6 @@ private CodeClass CreateInheritedModelDeclaration(OpenApiUrlTreeNode currentNode
     {
         var flattenedAllOfs = schema.AllOf.FlattenSchemaIfRequired(static x => x.AllOf).ToArray();
         var referenceId = schema.Reference?.Id;
-        var className = (schema.GetSchemaName(true) is string cName && !string.IsNullOrEmpty(cName) ?
-                            cName :
-                            (!string.IsNullOrEmpty(typeNameForInlineSchema) ?
-                                typeNameForInlineSchema :
-                                currentNode.GetClassName(config.StructuredMimeTypes, operation: operation, suffix: classNameSuffix, schema: schema, requestBody: isRequestBody)))
-                        .CleanupSymbolName();
         var shortestNamespaceName = GetModelsNamespaceNameFromReferenceId(referenceId);
         var codeNamespaceFromParent = GetShortestNamespace(codeNamespace, schema);
         if (rootNamespace is null)
@@ -1609,6 +1603,12 @@ private CodeClass CreateInheritedModelDeclaration(OpenApiUrlTreeNode currentNode
         var inlineSchema = Array.Find(flattenedAllOfs, static x => !x.IsReferencedSchema());
         var referencedSchema = Array.Find(flattenedAllOfs, static x => x.IsReferencedSchema());
         var rootSchemaHasProperties = schema.HasAnyProperty();
+        var className = (schema.GetSchemaName(schema.IsSemanticallyMeaningful()) is string cName && !string.IsNullOrEmpty(cName) ?
+                cName :
+                (!string.IsNullOrEmpty(typeNameForInlineSchema) ?
+                    typeNameForInlineSchema :
+                    currentNode.GetClassName(config.StructuredMimeTypes, operation: operation, suffix: classNameSuffix, schema: schema, requestBody: isRequestBody)))
+            .CleanupSymbolName();
         var codeDeclaration = (rootSchemaHasProperties, inlineSchema, referencedSchema) switch
         {
             // greatest parent type
diff --git a/tests/Kiota.Builder.Tests/KiotaBuilderTests.cs b/tests/Kiota.Builder.Tests/KiotaBuilderTests.cs
index 1032c91c52..1229f61547 100644
--- a/tests/Kiota.Builder.Tests/KiotaBuilderTests.cs
+++ b/tests/Kiota.Builder.Tests/KiotaBuilderTests.cs
@@ -7400,6 +7400,85 @@ public async Task InheritanceWithAllOfInBaseType()
         Assert.NotNull(codeModel.FindChildByName<CodeClass>("Group"));
     }
     [Fact]
+    public async Task InlineSchemaWithSingleAllOfReference()
+    {
+        var tempFilePath = Path.Combine(Path.GetTempPath(), Path.GetTempFileName());
+        await using var fs = await GetDocumentStream(@"openapi: 3.0.1
+info:
+  title: OData Service for namespace microsoft.graph
+  description: This OData service is located at https://graph.microsoft.com/v1.0
+  version: 1.0.1
+servers:
+  - url: https://graph.microsoft.com/v1.0
+paths:
+  /user:
+    get:
+      responses: 
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/microsoft.graph.user'
+  /group/members:
+    get:
+      responses: 
+        '200':
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/microsoft.graph.member'
+components:
+  schemas:
+    microsoft.graph.directoryObject:
+      required: ['@odata.type']
+      properties:
+        '@odata.type':
+          type: 'string'
+          default: '#microsoft.graph.directoryObject'
+      discriminator:
+        propertyName: '@odata.type'
+        mapping:
+          '#microsoft.graph.group': '#/components/schemas/microsoft.graph.group'
+    microsoft.graph.group:
+      allOf:
+        - '$ref': '#/components/schemas/microsoft.graph.directoryObject'
+        - title: 'group'
+          type: 'object'
+          properties:
+            groupprop:
+              type: 'string'
+    microsoft.graph.member:
+      type: 'object'
+      properties:
+        group:
+          allOf:
+            - '$ref': '#/components/schemas/microsoft.graph.group'
+    microsoft.graph.user:
+      properties:
+        groups:
+          type: array
+          items:
+            - '$ref': '#/components/schemas/microsoft.graph.group'");
+        var mockLogger = new Mock<ILogger<KiotaBuilder>>();
+        var builder = new KiotaBuilder(mockLogger.Object, new GenerationConfiguration { ClientClassName = "Graph", OpenAPIFilePath = tempFilePath }, _httpClient);
+        var document = await builder.CreateOpenApiDocumentAsync(fs);
+        var node = builder.CreateUriSpace(document);
+        var codeModel = builder.CreateSourceModel(node);
+        var memberClass = codeModel.FindChildByName<CodeClass>("member");
+        Assert.NotNull(memberClass);
+        Assert.Equal(2, memberClass.Properties.Count());// single prop plus additionalData
+        Assert.Null(memberClass.StartBlock.Inherits);//no base
+        var userClass = codeModel.FindChildByName<CodeClass>("user");
+        Assert.NotNull(userClass);
+        Assert.Equal(2, userClass.Properties.Count());// single prop plus additionalData
+        Assert.Null(userClass.StartBlock.Inherits);//no base
+        var inlinedClassThatIsDuplicate = codeModel.FindChildByName<CodeClass>("member_group");
+        Assert.Null(inlinedClassThatIsDuplicate);//no duplicate
+        var modelsNamespace = codeModel.FindChildByName<CodeNamespace>("ApiSdk.models.microsoft.graph");
+        Assert.NotNull(modelsNamespace);
+        Assert.Equal(4, modelsNamespace.Classes.Count());// only 4 classes for user, member, group and directoryObject
+    }
+    [Fact]
     public async Task InheritanceWithAllOfWith3Parts3SchemaChildClass()
     {
         var tempFilePath = Path.Combine(Path.GetTempPath(), Path.GetTempFileName());