Assuming you are using MQ v7. 'amqspr1 / amqssr1' and 'amqspr2 / amqssr2' use the Queued Pub/Sub interface and amqspub/amqssub use MQ v7 native style of Pub/Sub.
Check if your logged in user id is more than 12 characters long. If it's more than 12, then you might get this error.
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