Delete Task from Project Fin Plan

Summary:

Delete all Tasks from the Financial Plan

Content (please ensure you mask any confidential information):

Hi Experts

We would like to delete all task from the Plan but system is not allowing .

It gives below error mesg

Version (include the version you are using, if applicable):

We have Rejected the Budget Version and we only have working
Please help Urgent

Code Snippet (add any code snippets that su