This is the seqId property of a collection-policy FSM task, a sequence number identifying this task's order among the tasks spawned during the workflow applying a stats collection policy. An admin uses this sequence number to reconstruct the order in which tasks were issued when troubleshooting a collection-policy update that involved several background operations. For example, comparing seqId values across a set of FSM tasks lets the admin see which task ran first and therefore which one to check if an early step is suspected of causing a later failure.