# Avoid reusing the same message group ID with virtual queues in Amazon SQS
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When using virtual queues with a shared host queue, avoid reusing the same [https://docs.aws.amazon.com/AWSSimpleQueueService/latest/APIReference/API_SendMessage.html](https://docs.aws.amazon.com/AWSSimpleQueueService/latest/APIReference/API_SendMessage.html) across different virtual queues. If multiple virtual queues share the same host queue and contain messages with the same `MessageGroupId`, those messages can block each other, preventing efficient processing. To ensure smooth message processing, assign unique `MessageGroupId` values for messages in different virtual queues.