Hey @amanda.gondim
It looks like the issue is related to the Unique Reference setting in UiPath Orchestrator. If this option is enabled, Orchestrator won’t allow adding a new queue item with the same reference, even if the previous one is no longer visible.
Try checking all queue statuses, including Failed, In Progress, or Retried, as the item might still exist in the system. Additionally, you can use Get Queue Items before adding a new entry to confirm whether the reference is already present.
If the issue persists and you are sure the item is not in the queue, it might be a system bug, and you may need to contact UiPath Support for further investigation.
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