diff --git a/modules/backend/classes/FormField.php b/modules/backend/classes/FormField.php
index f2812da00..3ebaf1b56 100644
--- a/modules/backend/classes/FormField.php
+++ b/modules/backend/classes/FormField.php
@@ -481,8 +481,9 @@ class FormField
         // Reduce the field reference for the trigger condition field
         $triggerFieldParentLevel = Str::getPrecedingSymbols($triggerField, self::HIERARCHY_UP);
         if ($triggerFieldParentLevel > 0) {
+            // Remove the preceding symbols from the trigger field name
             $triggerField = substr($triggerField, $triggerFieldParentLevel);
-            $triggerForm = HtmlHelper::reduceFieldNameHierarchy($triggerForm, $triggerFieldParentLevel);
+            $triggerForm = HtmlHelper::reduceNameHierarchy($triggerForm, $triggerFieldParentLevel);
         }
 
         if ($this->arrayName) {