Could you explain "Moving any issue in the same column from below to all the to top on an agile board " - that makes no sense - I cannot imagine what you are doing beyond picking up an issue and dragging it to... um...
This message means your instance has exceeded the max rank value length (255) and now is performing a blocked balance. The best approach here is just wait for the load balance to end, and then you will be able to use your Agile boards as always.
If this takes too long, I would recommend to reach Atlassian Support to help you with your specific case.
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