diff --git a/system/scripts/items/advancement-sheet.js b/system/scripts/items/advancement-sheet.js
index ddbb163..3cbca7c 100644
--- a/system/scripts/items/advancement-sheet.js
+++ b/system/scripts/items/advancement-sheet.js
@@ -95,46 +95,55 @@ export class AdvancementSheetL5r5e extends ItemSheetL5r5e {
      * @private
      */
     async _updateChoice(oldChoice, newChoice) {
-        let skillCatId = null;
-        const actor = duplicate(this.actor.data.data);
         let xp_used = this.object.data.data.xp_used;
         let name = this.object.data.name;
         let img = this.object.data.img;
 
-        // Old choices
-        if (oldChoice.ring) {
-            actor.rings[oldChoice.ring] = Math.max(1, actor.rings[oldChoice.ring] - 1);
-        }
-        if (oldChoice.skill) {
-            skillCatId = CONFIG.l5r5e.skills.get(oldChoice.skill);
-            actor.skills[skillCatId][oldChoice.skill] = Math.max(0, actor.skills[skillCatId][oldChoice.skill] - 1);
-        }
-
-        // new choices
+        // Modify image to reflect choice
         if (newChoice.ring) {
-            actor.rings[newChoice.ring] = actor.rings[newChoice.ring] + 1;
-            xp_used = actor.rings[newChoice.ring] * CONFIG.l5r5e.xp.ringCostMultiplier;
-            name =
-                game.i18n.localize(`l5r5e.rings.${newChoice.ring}`) +
-                ` +1 (${actor.rings[newChoice.ring] - 1} -> ${actor.rings[newChoice.ring]})`;
             img = `systems/l5r5e/assets/icons/rings/${newChoice.ring}.svg`;
-        }
-        if (newChoice.skill) {
-            skillCatId = CONFIG.l5r5e.skills.get(newChoice.skill);
-            actor.skills[skillCatId][newChoice.skill] = actor.skills[skillCatId][newChoice.skill] + 1;
-            xp_used = actor.skills[skillCatId][newChoice.skill] * CONFIG.l5r5e.xp.skillCostMultiplier;
-            name =
-                game.i18n.localize(`l5r5e.skills.${skillCatId}.${newChoice.skill}`) +
-                ` +1 (${actor.skills[skillCatId][newChoice.skill] - 1} -> ${
-                    actor.skills[skillCatId][newChoice.skill]
-                })`;
+        } else if (newChoice.skill) {
             img = `systems/l5r5e/assets/dices/default/skill_blank.svg`;
         }
 
-        // Update Actor
-        await this.actor.update({
-            data: diffObject(this.actor.data.data, actor),
-        });
+        // Object embed in actor ?
+        if (this.actor) {
+            const actor = duplicate(this.actor.data.data);
+            let skillCatId = null;
+
+            // Old choices
+            if (oldChoice.ring) {
+                actor.rings[oldChoice.ring] = Math.max(1, actor.rings[oldChoice.ring] - 1);
+            }
+            if (oldChoice.skill) {
+                skillCatId = CONFIG.l5r5e.skills.get(oldChoice.skill);
+                actor.skills[skillCatId][oldChoice.skill] = Math.max(0, actor.skills[skillCatId][oldChoice.skill] - 1);
+            }
+
+            // new choices
+            if (newChoice.ring) {
+                actor.rings[newChoice.ring] = actor.rings[newChoice.ring] + 1;
+                xp_used = actor.rings[newChoice.ring] * CONFIG.l5r5e.xp.ringCostMultiplier;
+                name =
+                    game.i18n.localize(`l5r5e.rings.${newChoice.ring}`) +
+                    ` +1 (${actor.rings[newChoice.ring] - 1} -> ${actor.rings[newChoice.ring]})`;
+            }
+            if (newChoice.skill) {
+                skillCatId = CONFIG.l5r5e.skills.get(newChoice.skill);
+                actor.skills[skillCatId][newChoice.skill] = actor.skills[skillCatId][newChoice.skill] + 1;
+                xp_used = actor.skills[skillCatId][newChoice.skill] * CONFIG.l5r5e.xp.skillCostMultiplier;
+                name =
+                    game.i18n.localize(`l5r5e.skills.${skillCatId}.${newChoice.skill}`) +
+                    ` +1 (${actor.skills[skillCatId][newChoice.skill] - 1} -> ${
+                        actor.skills[skillCatId][newChoice.skill]
+                    })`;
+            }
+
+            // Update Actor
+            await this.actor.update({
+                data: diffObject(this.actor.data.data, actor),
+            });
+        }
 
         // Update object
         await this.object.update({