fix history if group is no longer exists

diff --git a/erp24/services/HistoryService.php b/erp24/services/HistoryService.php
index e41fae0b6bafdc35d8023c3d4cf5bf3bf3f9ef00..8bdf6f46932439ff8618ca27aa81fb2d9e358c83 100644 (file)
--- a/erp24/services/HistoryService.php
+++ b/erp24/services/HistoryService.php
@@ -78,7 +78,7 @@ class HistoryService
             }
 
             $namesRow = $namesValues[$categoryAliasRow];
-            $nameValueRow = $namesRow[$valueRow];
+            $nameValueRow = $namesRow[$valueRow] ?? '';
 
             $historyCategories[$categoryAliasRow] = [
                 'name' => $categoryNameRow