[V5] Set data from a relationship inside a pivot table

[MustotoRN]

I want to set column "value" when creating a new "Materiel"

In Materiel Model :

  @manyToMany(() => Caracteristique, {
    pivotTable: 'STOCK_MATERIEL_CARACTERISTIQUES',
    localKey: 'id',
    pivotForeignKey: 'id_materiel',
    relatedKey: 'id',
    pivotRelatedForeignKey: 'id_caracteristique',
    pivotColumns: ['value'],
  })
  public caracteristiques: ManyToMany<typeof Caracteristique>

In Caracteristique Model :

  @manyToMany(() => Materiel, {
    pivotTable: 'STOCK_MATERIEL_CARACTERISTIQUES',
    localKey: 'id',
    pivotForeignKey: 'id_caracteristique',
    relatedKey: 'id',
    pivotRelatedForeignKey: 'id_materiel',
    pivotColumns: ['value'],
  })
  public materiels: ManyToMany<typeof Materiel>

table STOCK_MATERIEL_CARACTERISTIQUES : [id, id_materiel, id_caracteristique, value]

[MustotoRN]

Creating my pivot row like that :

      const caracteristiques: Caracteristique[] = []
      if (caracteristiquesFields) {
        for (let i = 0; i < caracteristiquesFields.length; ++i) {
          caracteristiques[i] = await Caracteristique.findByOrFail('nom', caracteristiquesFields[i])
        }
      }

      Materiel.$getRelation('caracteristiques').boot()
      Materiel.$getRelation('caracteristiques').setRelated(materiel, caracteristiques)
      await materiel.related('caracteristiques').saveMany(caracteristiques)

[MustotoRN]

Materiel is the created model
Caracteristique is the existing model

I want to do the link between my new Materiel and all my choosen Caracteristique