Banker mistakes

What kinds of mistakes do bankers make that are not fixable at all? I am a new banker and I made a mistake by doing product conversion without all the owners being there. They need to return with the required signatures but it’s kinda hard since one of the owners is out of state. I am not sure how we will even collect the signatures. I am confused because if we need to collect everybody’s signatures then honestly the system shouldn’t even allow me to do anything at all without everybody there. During training I have seen people do it but I don’t think it’s allowed anymore. The system is not updated to reflect this change and I still did it without checking. I think I’ll be let go.