# Project Environment Exists
source: https://developer.mastercard.com/mastercard-developers-api/documentation/errors/project-env-exists/index.md

A requested project environment already exists in this project.

### Solution {#solution}

This error occurs when requesting a sandbox project for one that already has a sandbox environment or when requesting production access for a project that is already in production.

### API Error Response {#api-error-response}

**HTTP code 409**

```JSON

{
  "Errors": {
    "Error": [
      {
        "Source": "DEVELOPERS_API",
        "ReasonCode": "PROJECT_ENVIRONMENT_EXISTS",
        "Description": "A requested project environment already exists in this project",
        "Details": "1662389676788-7e6e4701-8434-47ae-a181-26cfa8f89c01",
        "Recoverable": false
      }
    ]
  }
}
```

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