How do I fix: 🔍 Why This Happens?

The problem arises because Swagger uses schemaIds to identify types in your API. When two classes with the same name are found, it creates duplicate schemaIds.This issue is more likely to occur when using namespaces, as they can lead to naming conflicts if not managed properly.

How do I fix: 🚀 How to Resolve This Issue UseFullTypeNameInSchemaIds?

Step 1: To resolve this issue, update your Swagger configuration to use the "UseFullTypeNameInSchemaIds" setting.Step 2: This setting tells Swagger to include the full type name in schemaIds, ensuring that duplicate IDs are avoided.Step 3: For example, if you have two classes named 'A' and 'B', usin

How do I fix: ReorganizeClassNames?

Step 1: Another approach is to reorganize your class names to avoid conflicts.Step 2: Consider renaming classes or using more specific names to ensure uniqueness.Step 3: This method may require more effort, but it's a viable solution if you're unable to use the "UseFullTypeNameInSchemaIds" setting.

Software⏱️ 3 min read📅 2026-06-04

How to Fix: swagger error: Conflicting schemaIds: Duplicate schemaIds detected for types A and B

Learn how to fix: swagger error: Conflicting schemaIds: Duplicate schemaIds detected for types A and B.

Quick Answer: Try checking your system settings or restarting.

📋 Table of Contents

🔍 Why This Happens
🚀 How to Resolve This Issue
🎯 Final Words

Swagger Error: Conflicting schemaIds - A common issue when using Web API and Swashbuckle to generate Swagger documentation.

This error occurs when two or more classes with the same name in different namespaces are defined. It can be frustrating for developers, but don't worry, there's a potential workaround.

🔍 Why This Happens

The problem arises because Swagger uses schemaIds to identify types in your API. When two classes with the same name are found, it creates duplicate schemaIds.
This issue is more likely to occur when using namespaces, as they can lead to naming conflicts if not managed properly.

🚀 How to Resolve This Issue

UseFullTypeNameInSchemaIds

Step 1: To resolve this issue, update your Swagger configuration to use the "UseFullTypeNameInSchemaIds" setting.
Step 2: This setting tells Swagger to include the full type name in schemaIds, ensuring that duplicate IDs are avoided.
Step 3: For example, if you have two classes named 'A' and 'B', using full type names will result in unique schemaIds for each class.

ReorganizeClassNames

Step 1: Another approach is to reorganize your class names to avoid conflicts.
Step 2: Consider renaming classes or using more specific names to ensure uniqueness.
Step 3: This method may require more effort, but it's a viable solution if you're unable to use the "UseFullTypeNameInSchemaIds" setting.

🎯 Final Words

By understanding the cause of this error and implementing one of the suggested solutions, you can resolve the Swagger error: Conflicting schemaIds and get back to developing your Web API with confidence.

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