diff --git a/system/scripts/migration.js b/system/scripts/migration.js
index 074dee5..0027771 100644
--- a/system/scripts/migration.js
+++ b/system/scripts/migration.js
@@ -295,8 +295,9 @@ export class MigrationL5r5e {
                 update.items.forEach(item => {
                     const skillId    = item.flags?.l5r5e?.skillCoreId;
                     const skillCatId = CONFIG.l5r5e.skills.get(skillId);
-                    if (skillCatId && system.skills[skillCatId][skillId]) {
-                        item.system.rank = system.skills[skillCatId][skillId];
+                    const skillValue = system.skills[skillCatId][skillId];
+                    if (skillCatId && skillValue > 0) {
+                        item.system.rank = skillValue;
                     }
                 });