The project you abandoned still left you with skills. Nothing you worked on was wasted.

An unfinished project looks like a loss because you measure it by the thing that does not exist. The learning went somewhere else, into your hands and your judgement, and it stays with you whether or not the object ever got made. Much of what you are good at now was paid for by something nobody ever saw.

Think back to one you dropped and name two things it taught you. Notice where those show up in what you are making now, and let the abandoned thing stop counting as a debt.