checkPlausibilityOfPut Method fixed so that user does not get an error, only a error is logged. This is needed since it could be that the user can trigger this logging by using the editor normally. For example: the source segments contain different strings with the same meaning, the second edited target contains a typo which was corrected by the editor. So two segments are saved successive with the same target content. Because of initial different source and target its not recognized as alike.