Update skill sheet

module/models/armor.mjs

@@ -32,4 +32,29 @@ export default class PrismRPGArmor extends foundry.abstract.TypeDataModel {
   /** @override */
   static LOCALIZATION_PREFIXES = ["PRISMRPG.Armor"]
 
+  static migrateData(data) {
+    // Migrate old money types to new ones
+    if (data?.money) {
+      const moneyMigration = {
+        "tinbit": "coppercoin",
+        "copper": "coppercoin",
+        "silver": "silvercoin",
+        "gold": "goldcoin",
+        "platinum": "note"
+      }
+
+      if (moneyMigration[data.money]) {
+        data.money = moneyMigration[data.money]
+      }
+
+      // If still invalid, default to coppercoin
+      if (!SYSTEM.MONEY[data.money]) {
+        console.warn(`Prism RPG | Migrate armor: Invalid money type "${data.money}", defaulting to coppercoin`)
+        data.money = "coppercoin"
+      }
+    }
+
+    return super.migrateData(data)
+  }
+
 }