An issue has come up lately as we break down stories.. The scenario is as follows: During product increment planning we outline X amount of stories for the PI. This is recorded in Jira with story points associated to each story. As we go into sprint planning we often find the the original stories may be to broad, or may not not fill a business requirement.
So two question:
Granted its a tooling problem, but is it the norm to link the new stories back to the original? If the original story had say 20 story points and the sub story has 10, would you reduce 10 from the original story to avoid double counting?