diff --git a/lib/src/form/src/controller.dart b/lib/src/form/src/controller.dart
index 5a1262a..5711bcc 100644
--- a/lib/src/form/src/controller.dart
+++ b/lib/src/form/src/controller.dart
@@ -336,7 +336,9 @@ class AstromicFormController extends FormController {
       // Recursively handle subgroups
       if (groupStructure.subGroups != null && groupStructure.subGroups!.isNotEmpty) {
         for (final (FormGroupStructure subGroup, int subgroupInitialCount) in groupStructure.subGroups!) {
-          final String nestedPrefix = '$parentPrefix${standeredGroupFormat(groupStructure.id, groupIndex, subGroup.id)}';
+          final String nestedPrefix = parentPrefix.isEmpty
+              ? standeredGroupFormat(groupStructure.id, groupIndex, subGroup.id) // If no parentPrefix, use the group directly
+              : '$parentPrefix->${standeredGroupFormat(groupStructure.id, groupIndex, subGroup.id)}'; // Add to parentPrefix
 
           // Initialize subgroup controllers recursively
           for (int subIndex = 0; subIndex < subgroupInitialCount; subIndex++) {