Basically in my programme i want to delete a row, but went i want to delete it, it won’t

 
public function maj_fiche_perso($nouvelleFiche,$ancienneFiche,$id_article)
    {
        $champPersonalisesModel = new ChampPersonnalisesModel();

        $resultat = $this->select('champarticles.id')->join('champpersonnalises','champarticles.id_champpersonalises = champpersonnalises.id')->where('id_article',$id_article)->where('groupe',$ancienneFiche)->findAll(); 


        if(!empty($resultat))
            foreach($resultat as $champ )
                $this->delete($champ['id']);
            
               
            
        $champNouvelleFiche = $champPersonalisesModel->get_champs_groupe($nouvelleFiche);
        foreach($champNouvelleFiche as $champ)
            $this->insert(['id_article'=>$id_article,'id_champpersonalises'=>$champ['id'],'id_utilisateur'=>session('id')]);
            
    }

I want to replace group a personale information by a other, I use this function inside a model