diff --git a/server/src/cronTasks.js b/server/src/cronTasks.js
index 5db0916..fdbd040 100644
--- a/server/src/cronTasks.js
+++ b/server/src/cronTasks.js
@@ -16,7 +16,10 @@ cron.schedule('*/1 * * * *', async () => {
   logMsg('updateDevicesInfo started.')
 
   const devices = await updateDevicesInfo()
-  const mappings = await updateUserIdMappings()
+
+  let mappings = null
+
+  if (devices > 0) mappings = await updateUserIdMappings()
 
   logMsg(
     `updateDevicesInfo updated ${devices} devices and ${mappings} user-id mappings.`