Resubmit a Task
You can resubmit a process task that has been rejected but can't be deleted, cleared, or hidden.
Tasks confirm that something has been achieved. Tasks are only designed to complete if a specific outcome is recorded. Instead, tasks confirm that an action was taken. So, even if a task was rejected, that rejection is still seen as action. So, most of the time, you must resubmit a task so that it triggers the process again.
To trigger the process that resubmits a task, a SPoC needs to identify the process that created the task and the related dependent fields and conditions.
Once you do so and resubmit the task, the rejected status disappears, and you can complete the task.