diff --git a/extension/Classes/Core/AbstractBuildForm.php b/extension/Classes/Core/AbstractBuildForm.php
index 65db9a2a32ed8340773adf60504d0988068a8569..b1749c67af12af276e473734bff159ac02c3cee4 100644
--- a/extension/Classes/Core/AbstractBuildForm.php
+++ b/extension/Classes/Core/AbstractBuildForm.php
@@ -2443,6 +2443,7 @@ abstract class AbstractBuildForm {
      */
     private function buildSubrecordRowsHtml(array $formElement, array $rowSettings, $additionalRow = false): string {
         $htmlBody = '';
+        $rowHtml = '';
         $subrecordToken = FE_SQL1;
 
         // Configure formElement array for additional rows.
@@ -2453,7 +2454,6 @@ abstract class AbstractBuildForm {
 
         foreach ($formElement[$subrecordToken] as $row) {
             $rowHtml = '';
-
             if ($formElement[FE_MODE] == FE_MODE_READONLY) {
                 $editToolTip = 'Show';
                 $editSymbol = SYMBOL_SHOW;