If you've already graduated from a thing you've already tested out...you've earned the Diploma that advances you to the next level, why would you go back to sit through the course again?
When you go back to a course you've already graduated out of you, will find yourself occupying a seat that is for someone else.
Do NOT sleep on where you've come from... what you've learned...
Keep Advancing, Keep Going Forward!
Don't hold yourself back either.. to fill up someone's classroom.
Someone else's spot, who needs it! Because you've forgotten that you've already mastered that part!
You've graduated... You have the credits to prove it. (Knowledge)
Celebrate & Keep Moving Forward!!!