In September, I will be a second-year PhD(Operations Management) student.
I wrote up a proposal. However, when implementing the model, I made a couple of mistakes. The results are unclear. Am I going to finish?
When getting an MPhil degree(the same supervisor), I fulfilled 8 out of 12 requirements for associatship in Society of Actuaries because my supervisor(for RA) and other professor(for TA) requires me to have equivalent amount of knowledge for teaching and research. Will I be able to finish associateship?

I know it sounds trivial but it is very important to me.
For some reason, I panicked.

We have all made mistakes and a PhD is the perfect place to learn from them. You shouldn't doubt yourself to so much over 1 proposal, we have all been there. If you can learn from the mistakes and fix them you should be fine.

Sorry I can't help withe the associateship as don't know anything about it and I don't understand your problem. Is your supervisor stopping you or is there a time limit?

Nobody is stopping me from associeteship in associateship.
It is PhD work with constant failures that makes me feel pessimistic and doubt about everything.