[FIX] Field Groups hydration

lib/src/form/src/controller.dart

@@ -145,7 +145,7 @@ class AstromicFormController {
     final def = _groupDefs[groupId];
     if (def == null) throw Exception('Group $groupId not registered.');
 
-    final newUuid = DateTime.now().microsecondsSinceEpoch.toString();
+    final newUuid = '${DateTime.now().microsecondsSinceEpoch}_${_nodes.length}';
 
     def.schema.forEach((fieldName, config) {
       final nodeKey = '${groupId}_${fieldName}_$newUuid';
@@ -174,6 +174,9 @@ class AstromicFormController {
   }
 
   void _createTypedNode<T>(String key, AstromicFieldConfig<T> config, T initialValue) {
+    // FORCE clear if it somehow exists (prevents ghosting)
+    _nodes.remove(key);
+
     _nodes[key] = AstromicFieldNode<T>(
       initialValue,
       formatter: config.formatter ?? (v) => v.toString(),