diff --git a/bundles/infobeamer-monitor/files/monitor.py b/bundles/infobeamer-monitor/files/monitor.py
index 36c2497..6f353e6 100644
--- a/bundles/infobeamer-monitor/files/monitor.py
+++ b/bundles/infobeamer-monitor/files/monitor.py
@@ -140,13 +140,12 @@ while True:
                         if device["is_online"]:
                             if device["maintenance"]:
                                 mqtt_out(
-                                    "maintenance required: {}".join(
+                                    "maintenance required: {}".format(' '.join(
                                         sorted(device["maintenance"])
-                                    ),
+                                    )),
                                     level="WARN",
                                     device=device,
                                 )
-                                must_dump_state = True
 
                         if (
                             device["is_synced"] != state[did]["is_synced"]