[Pharo-users] ShouldNotImplement: #add: should not have been implemented in Array

Hi, I was coding today and after creating a method with only the name and a comment and trying to save it I started to get this message: "ShouldNotImplement: #add: should not have been implemented in Array". I don't see anything related to my code that can be generating this. The environment is still working, but the message is annoying. Any pointers on how to solve it? Cheers, Offray