It takes a lot of work to come through other people’s work in detail. Even revisiting your old papers that you yourself wrote can have you scratching your head

It takes a lot of work to come through other people’s work in detail. Even revisiting your old papers that you yourself wrote can have you scratching your head and reaching for your notes from the time. Maybe the authors had some problems using these methods for another more recent project, and found the error. Retraction doesn’t mean ‘it’s wrong please pretend this never happened,’ they will pull the paper as it contains an error, fix it, then resubmit it.