diff --git a/module/actor-sheet.js b/module/actor-sheet.js
index bb492228..e42c3ce8 100644
--- a/module/actor-sheet.js
+++ b/module/actor-sheet.js
@@ -56,7 +56,7 @@ export class RdDActorSheet extends ActorSheet {
         item.data.xpNext = RdDItemCompetence.getCompetenceNextXp(item.data.niveau);
         item.data.isLevelUp = item.data.xp >= item.data.xpNext; // Flag de niveau à MAJ
         //this.actor.checkCompetenceXP(item.name); // Petite vérification experience
-        item.data.showCompetence = !data.data.showCompNiveauBase || (Number(item.data.niveau) != Number(RdDUtility.getLevelCategory(item.data.categorie)));
+        item.data.showCompetence = !data.data.showCompNiveauBase || (Number(item.data.niveau) != Number(RdDItemCompetence.getLevelCategory(item.data.categorie)));
         // Ignorer les compétences 'troncs' à ce stade
         data.data.competenceXPTotal += RdDItemCompetence.computeCompetenceXPCost(item);
         return item;
diff --git a/module/actor.js b/module/actor.js
index f732bd7a..92afa55d 100644
--- a/module/actor.js
+++ b/module/actor.js
@@ -710,7 +710,7 @@ export class RdDActor extends Actor {
       return;
     }
     let caracpath = "data.carac." + caracName + ".xp";
-    await this.update({ [caracpath]: caracXP });
+    await this.update({ [caracpath]: caracXP ?? 0 });
     this.checkCaracXP(caracName);
   }
 
@@ -736,7 +736,7 @@ export class RdDActor extends Actor {
     let comp = this.getCompetence(compName);
     if (comp) {
       let troncList = RdDItemCompetence.isTronc(compName);
-      let maxNiveau = compValue;
+      let nouveauNiveau = compValue ?? RdDItemCompetence.getLevelCategory(comp.data.categorie);
       if (troncList) {
         let message = "Vous avez modifié une compétence 'tronc'. Vérifiez que les compétences suivantes évoluent ensemble jusqu'au niveau 0 : ";
         for (let troncName of troncList) {
@@ -747,7 +747,7 @@ export class RdDActor extends Actor {
           content: message
         });
       }
-      const update = { _id: comp._id, 'data.niveau': maxNiveau };
+      const update = { _id: comp._id, 'data.niveau': nouveauNiveau };
       const updated = await this.updateEmbeddedEntity("OwnedItem", update); // Updates one EmbeddedEntity
     } else {
       console.log("Competence not found", compName);
@@ -758,6 +758,7 @@ export class RdDActor extends Actor {
   async updateCompetenceXP(compName, compValue) {
     let comp = this.getCompetence(compName);
     if (comp) {
+      compValue = compValue ?? 0;
       this.checkCompetenceXP(compName, compValue);
       const update = { _id: comp._id, 'data.xp': compValue };
       const updated = await this.updateEmbeddedEntity("OwnedItem", update); // Updates one EmbeddedEntity
@@ -771,6 +772,7 @@ export class RdDActor extends Actor {
   async updateCompetenceXPSort(compName, compValue) {
     let comp = this.getCompetence(compName);
     if (comp) {
+      compValue = compValue ?? 0;
       const update = { _id: comp._id, 'data.xp_sort': compValue };
       const updated = await this.updateEmbeddedEntity("OwnedItem", update); // Updates one EmbeddedEntity
     } else {
@@ -782,6 +784,7 @@ export class RdDActor extends Actor {
   async updateCompetenceArchetype(compName, compValue) {
     let comp = this.getCompetence(compName);
     if (comp) {
+      compValue = compValue ?? 0;
       const update = { _id: comp._id, 'data.niveau_archetype': compValue };
       const updated = await this.updateEmbeddedEntity("OwnedItem", update); // Updates one EmbeddedEntity
     } else {
diff --git a/module/item-competence.js b/module/item-competence.js
index deca47f1..2820001a 100644
--- a/module/item-competence.js
+++ b/module/item-competence.js
@@ -5,6 +5,18 @@ const competenceTroncs = [["Esquive", "Dague", "Corps à corps"],
 const competence_xp_par_niveau = [5, 5, 5, 10, 10, 10, 10, 15, 15, 15, 15, 20, 20, 20, 20, 30, 30, 40, 40, 60, 60, 100, 100, 100, 100, 100, 100, 100, 100, 100];
 const competence_niveau_max = competence_xp_par_niveau.length - 10;
 
+/* -------------------------------------------- */
+const categorieCompetences = {
+  "generale": { level: "-4", label: "Générales" },
+  "particuliere": { level: "-8", label: "Particulières" },
+  "specialisee": { level: "-11", label: "Spécialisées" },
+  "connaissance": { level: "-11", label: "Connaissances" },
+  "draconic": { level: "-11", label: "Draconics" },
+  "melee": { level: "-6", label: "Mêlée" },
+  "tir": { level: "-8", label: "Tir" },
+  "lancer": { level: "-8", label: "Lancer" }
+}
+
 function _buildCumulXP() {
   let cumulXP = { "-11": 0 };
   let cumul = 0;
@@ -20,6 +32,16 @@ const competence_xp_cumul = _buildCumulXP();
 
 export class RdDItemCompetence extends Item {
 
+  static getCategorieCompetences() {
+    return categorieCompetences;
+  }
+  static getLevelCategory(category) {
+    return categorieCompetences[category].level;
+  }
+  static getLabelCategory(category) {
+    return categorieCompetences[category].label;
+  }
+
   /* -------------------------------------------- */
   static isCompetenceArme(competence) {
     switch (competence.data.categorie) {
diff --git a/module/item-sheet.js b/module/item-sheet.js
index f70e3483..2d1bfdf6 100644
--- a/module/item-sheet.js
+++ b/module/item-sheet.js
@@ -48,7 +48,7 @@ export class RdDItemSheet extends ItemSheet {
   /* -------------------------------------------- */
   async getData() {
     let data = super.getData();
-    data.categorieCompetences = RdDUtility.getCategorieCompetences();
+    data.categorieCompetences = RdDItemCompetence.getCategorieCompetences();
     if ( data.item.type == 'tache' || data.item.type == 'livre' || data.item.type == 'meditation' || data.item.type == 'oeuvre') {
       data.caracList = duplicate(game.system.model.Actor.personnage.carac);
       data.competences = await RdDUtility.loadCompendiumNames( 'foundryvtt-reve-de-dragon.competences' );
@@ -111,7 +111,7 @@ export class RdDItemSheet extends ItemSheet {
   async _onClickSelectCategorie(event) {
     event.preventDefault();
     
-    let level = RdDUtility.getLevelCategory(event.currentTarget.value);    
+    let level = RdDItemCompetence.getLevelCategory(event.currentTarget.value);    
     this.object.data.data.base = level;
     $("#base").val( level ); 
   }
diff --git a/module/rdd-utility.js b/module/rdd-utility.js
index 482b829d..d9cfa1e0 100644
--- a/module/rdd-utility.js
+++ b/module/rdd-utility.js
@@ -1,27 +1,10 @@
 /* Common useful functions shared between objects */
 
-import { RdDRollTables } from "./rdd-rolltables.js";
 import { ChatUtility } from "./chat-utility.js";
-import { RdDCombat, RdDCombatManager } from "./rdd-combat.js";
-import { RdDRollResolutionTable } from "./rdd-roll-resolution-table.js";
-import { RdDItemCompetenceCreature } from "./item-competencecreature.js";
-import { RdDItemArme } from "./item-arme.js";
-import { RdDItemCompetence } from "./item-competence.js";
+import { RdDCombat } from "./rdd-combat.js";
 import { Misc } from "./misc.js";
 import { Grammar } from "./grammar.js";
 
-/* -------------------------------------------- */
-const categorieCompetences = {
-  "generale": { level: "-4", label: "Générales" },
-  "particuliere": { level: "-8", label: "Particulières" },
-  "specialisee": { level: "-11", label: "Spécialisées" },
-  "connaissance": { level: "-11", label: "Connaissances" },
-  "draconic": { level: "-11", label: "Draconics" },
-  "melee": { level: "-6", label: "Mêlée" },
-  "tir": { level: "-8", label: "Tir" },
-  "lancer": { level: "-8", label: "Lancer" }
-}
-
 /* -------------------------------------------- */
 const limitesArchetypes = [
   { "niveau": 0, "nombreMax": 100, "nombre": 0 },
@@ -403,15 +386,6 @@ export class RdDUtility {
   }
 
   /* -------------------------------------------- */
-  static getCategorieCompetences() {
-    return categorieCompetences;
-  }
-  static getLevelCategory(category) {
-    return categorieCompetences[category].level;
-  }
-  static getLabelCategory(category) {
-    return categorieCompetences[category].label;
-  }
   static getCaracArray() {
     return carac_array;
   }