Reset the digit number in auto generated id


I'm using Plone 4.3. I've a content type called Project. The last object created is with id "project-79". I deleted 11 last objects. Know, if I try to create a new object the id is set to "project-80". Is there a way to set the digit number in the id using Plone manage_main GUI?

Thanks for your help

If the code of the "project" content type is your own code then implement the ID generation on your own instead of relying on Plone doing this.