Task name Awaiting for other lines already exists in the task definition. Enter a unique task name

Summary:

While trying to Import Orch. process Def. I am getting a following error.

Task name Awaiting for other lines already exists in the task definition. Enter a unique task name.

Tried changing the Task Name 'Awaiting for other lines' to different task name and its not allowing to save or even replace the file file TaskTypeSetupVo in the zip package

Could you pls let me know whats causing this and how to get rid of this error.