[Pharo-project] looks like move to class side forgets the class message on the instance side

Hi I got SLLogObject>>error "To convey an error." level := self errorLevelString SLLogObject>>errorLevelString ^ 'error' then I did move to class side and …. SLLogObject>>error "To convey an error." level := self errorLevelString stayed the same. Does anybody encounter this problem? Stef