I had a similar experience with a huge lotus notes database I supported. Like a year after they let me go, they wanted to hire me back for the end of year/begin

I had a similar experience with a huge lotus notes database I supported. Like a year after they let me go, they wanted to hire me back for the end of year/beginning of the year setup that the db required. They were super rude about how they approached me through the contract agency. I just ghosted them and figured they'd get someone to handle it for them. It was mostly documented anyway, but I assume they had also laid off anyone that knew enough about notes to follow the documentation.