Try to fix generation of multiple identical classes #4191

src/Kiota.Builder/KiotaBuilder.cs

@@ -1656,9 +1656,13 @@ private CodeTypeBase CreateModelDeclarations(OpenApiUrlTreeNode currentNode, Ope
             true => (GetShortestNamespace(parentElement.GetImmediateParentOfType<CodeNamespace>(), schema), response, string.Empty), // referenced schema
             false => (parentElement.GetImmediateParentOfType<CodeNamespace>(), null, suffixForInlineSchema), // Inline schema, i.e. specific to the Operation
         };
-
         // If typeNameForInlineSchema is not null and the schema is referenced, we have most likely unwrapped a referenced schema(most likely from an AllOf/OneOf/AnyOf).
         // Therefore the current type/schema is not really inlined, so invalidate the typeNameForInlineSchema and just work with the information from the schema reference.
+        if (schema.AllOf.Count == 1 && schema.Reference == null && !schema.Properties.Any())
+        {
+            schema.Reference = schema.AllOf.First().Reference;
+        }
+
         if (schema.IsReferencedSchema() && !string.IsNullOrEmpty(typeNameForInlineSchema))
         {
             typeNameForInlineSchema = string.Empty;