What means 'retracted' for an event in the server response

what means ‘retracted’ for an event name in the server response?

These are events that are no longer considered to be of astrophysical origin. Typically this occurs when onboard or rapid online analyses emit alerts about a detection (that we add to our database) but later analyses indicate issues with the data, the analysis or other factors. After the a “retraction” information has been published, we rename the events as “retracted”.