A user cannot delete an invoicing plan. Incase an invoicing plan has been created inadvertently for a new item though it wasn’t required or if an invoicing plan was initially created in the incorrect invoicing plan type, in that case, the item can be deleted and recreated.
In case the deleted item was not saved before this, then a short dump may take place. Here, Update termination after deleting an item with Re-plan
If the user doesn’t want to utilize an existing invoicing plan specifically for which the invoices have already been posted, the user needs to refer How to End a Periodic Invoicing plan or Restricting Date?