diff --git a/src/main/java/org/zephyrsoft/optigemspoonfeeder/ui/MainView.java b/src/main/java/org/zephyrsoft/optigemspoonfeeder/ui/MainView.java
index 05eba3a..7e04315 100644
--- a/src/main/java/org/zephyrsoft/optigemspoonfeeder/ui/MainView.java
+++ b/src/main/java/org/zephyrsoft/optigemspoonfeeder/ui/MainView.java
@@ -285,6 +285,8 @@ private void loadTables(String accountTableName, String projectsTableName) {
                     log.warn("konfigurierte Konten-Tabelle {} nicht gefunden", accountTableName);
                     return null;
                 });
+        } else {
+            tableOptigemAccounts = null;
         }
         if (StringUtils.isNotBlank(projectsTableName)) {
             tableOptigemProjects = tables.stream()
@@ -294,6 +296,8 @@ private void loadTables(String accountTableName, String projectsTableName) {
                     log.warn("konfigurierte Projekte-Tabelle {} nicht gefunden", projectsTableName);
                     return null;
                 });
+        } else {
+            tableOptigemProjects = null;
         }
     }