# VALIDATION\$1ERROR\$1SECURITY\$1GROUP\$1NOT\$1FROM\$1ONE\$1VPC
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## Overview
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When your cluster and the security groups that you assign to your cluster belong to different virtual private clouds (VPCs), the cluster terminates with a `VALIDATION_ERROR_SECURITY_GROUP_NOT_FROM_ONE_VPC` error. For more information about security groups, see [Specifying Amazon EMR-managed and additional security groups](emr-sg-specify.md) and [Control network traffic with security groups for your Amazon EMR cluster](emr-security-groups.md).

## Resolution
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To resolve this error, use security groups that belong to the same VPC as the cluster.

To troubleshoot the failed EMR cluster, refer to the `ErrorDetail` information returned from the `DescribeCluster` and `ListClusters` APIs. For more information, see [Error codes with ErrorDetail information in Amazon EMR](emr-troubleshoot-error-errordetail.md). The `ErrorData` array within `ErrorDetail` returns the following information for this error code:

**`vpc`**  
For each security-group:VPC pair, the ID for the VPC that the security group belongs to.

**`security-group`**  
For each security-group:VPC pair, the ID for the security group.

**`public-doc`**  
The public URL of the documentation for the error code.

## Steps to complete
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Perform the following steps to identify and fix the error:

1. Review the security group IDs that are listed in the `ErrorData` array and confirm that they belong to the VPC where you want to launch the EMR cluster.

1. Navigate to the Amazon VPC Console. Choose **Security groups** to list all of the security groups within the Region that you select. Find the security groups from the same VPC as your cluster, and then modify your security group configuration.

1. Launch a new cluster with security groups from the same VPC as the cluster.