This is what you should see when you open the Traceability Tree.
Notice that because you have changed UC3.2, all traceability relationships that involve that requirement are called into question and must be re-evaluated. The red diagonal line through the arrow indicator reminds you to do that.
Suspect relationships tell you that you should check the requirements to which this requirement is linked, to assess the impact of your UC change. Suspect links can be cleared after you have reviewed the impact of your edit by right-clicking the suspect link and then clicking Clear Suspect. Use Microsoft's Extended-Select (Shift > click or Ctrl > click) to select multiple suspect links to be cleared at one time.