diff --git a/setup/start.sh b/setup/start.sh
index 456dd8500..12a51cbb6 100755
--- a/setup/start.sh
+++ b/setup/start.sh
@@ -140,6 +140,7 @@ cat > "${CONFIG_DIR}/cloudron.conf" <<CONF_END
         "port": 3306,
         "name": "box"
     },
+    "restoredFromUrl": "${arg_restore_url}",
     "backupKey": "${arg_backup_key}",
     "aws": ${arg_aws}
 }
diff --git a/src/backups.js b/src/backups.js
index 8b296bdf0..26d19f1e8 100644
--- a/src/backups.js
+++ b/src/backups.js
@@ -94,7 +94,7 @@ function getRestoreUrl(backupId, callback) {
             id: backupId,
             url: result.url,
             sessionToken: result.sessionToken,
-            backupKey: config.backupKey()
+            backupKey: config.get('restoredFromUrl') && config.get('restoredFromUrl').indexOf('v0.0.39') > 0 ? '' : config.backupKey()
         };
 
         debug('getRestoreUrl: ', obj);