Here is the dilemma, you have created a structure in phases and notice that some elements of the structure don’t reflect the phase. In fact, the piece marks are displaying the wrong phase number in the Model browser and the drawings they were created on.
What do you do, certainly not renumber the entire structure?
Advance steel allows you to remove the numbering and information from the problematic elements using the Toggle switch display SP/MP tool located on the Output tab, Part marks panel.