diff --git a/app/src/main/java/eu/faircode/email/Core.java b/app/src/main/java/eu/faircode/email/Core.java
index c4d2c70062..93238b3412 100644
--- a/app/src/main/java/eu/faircode/email/Core.java
+++ b/app/src/main/java/eu/faircode/email/Core.java
@@ -2188,6 +2188,8 @@ class Core {
                 crumb.put("message", uid + ":" + message.uid);
                 crumb.put("what", ex.getMessage());
                 Log.breadcrumb("insert", crumb);
+
+                return null;
             } finally {
                 db.endTransaction();
             }