'App already open in different mode' issue

[lucianoginqo]

I am getting this error when updating the Metrics: 'App already open in different mode'

Here's a portion of the log by GMS
{"level":"info","msg":"undefined","meta":{"module":"objectManagement","app":"Executive Dashboard"}}
{"level":"info","msg":"Object Management Complete","meta":{"module":"objectManagement","app":"Executive Dashboard"}}
{"level":"debug","msg":"{ code: 1009,\n parameter: '1168e38c-335c-4d05-b43e-70f440dec5cd',\n message: 'App already open in different mode' }","meta":{"module":"updateMetrics","app":"Executive Dashboard"}}

What can be the cause?
Qlik Sense version: September 2017