diff --git a/typo3/sysext/backend/Classes/Controller/Wizard/TableController.php b/typo3/sysext/backend/Classes/Controller/Wizard/TableController.php
index 7851c8b5604734448f1330d975c170307cb833a5..21687d12740ebacb2e3996f3f1009c00b6c30da3 100644
--- a/typo3/sysext/backend/Classes/Controller/Wizard/TableController.php
+++ b/typo3/sysext/backend/Classes/Controller/Wizard/TableController.php
@@ -313,7 +313,7 @@ class TableController extends AbstractWizardController
                 } else {
                     // Regular line based table configuration:
                     $columns = $row[$this->colsFieldName] ?? 0;
-                    $configuration = $this->configurationStringToArray($row[$this->P['field']], (int)$columns);
+                    $configuration = $this->configurationStringToArray($row[$this->P['field']] ?? '', (int)$columns);
                 }
             }
             $configuration = is_array($configuration) ? $configuration : [];