diff --git a/app/Handlers/Observer/PiggyBankObserver.php b/app/Handlers/Observer/PiggyBankObserver.php
index 4a45ee3f47..9d91876d4a 100644
--- a/app/Handlers/Observer/PiggyBankObserver.php
+++ b/app/Handlers/Observer/PiggyBankObserver.php
@@ -39,7 +39,7 @@ class PiggyBankObserver
         $repetition->startdate     = $piggyBank->startdate;
         $repetition->startdate_tz  = $piggyBank->startdate->format('e');
         $repetition->targetdate    = $piggyBank->targetdate;
-        $repetition->targetdate_tz = $piggyBank->targetdate->format('e');
+        $repetition->targetdate_tz = $piggyBank->targetdate?->format('e');
         $repetition->currentamount = '0';
         $repetition->save();
     }