Item ehnance, fixes on acto sheet

module/applications/sheets/base-actor-sheet.mjs

@@ -95,6 +95,13 @@ export default class OathHammerActorSheet extends HandlebarsApplicationMixin(fou
 
   async _onDropItem(item) {
     const itemData = item.toObject()
+    // Lineage and class are unique: replace any existing item of the same type
+    if (item.type === "lineage" || item.type === "class") {
+      const existing = this.document.itemTypes[item.type]
+      if (existing.length > 0) {
+        await this.document.deleteEmbeddedDocuments("Item", existing.map(i => i.id))
+      }
+    }
     await this.document.createEmbeddedDocuments("Item", [itemData], { renderSheet: false })
   }