Why can't I enable Content-based deduplication on my SQS queue?

Context When attempting to configure Content-based deduplication on an Amazon SQS queue, you may receive the following error: Error processing message: An error occurred (InvalidParameterValue) when calling the SendMessage operation: The queue should either have ContentBasedDeduplication enabled or MessageDeduplicationId provided explicitly Answer Content-based deduplication is a feature that is only available for FIFO (First-In-First-Out) queues in Amazon SQS. Standard queues do not support this functionality. To resolve this issue: Verify that you are configuring the correct queue type - it must be a FIFO queue If you need content-based deduplication, ensure you are using a FIFO queue (queue name must end with .fifo) For standard queues, you will need to either: Switch to a FIFO queue if you require deduplication Or handle message deduplication in your application logic