Thank you, .
I will take a look into UWorks it looks promising, but I am not sure if I need it.
About problem with incompatible_unique_net_id it seems a bit weird since I dont have any special setup.
Just dedicated server and clients who pick free server from the database and connect via command line open IP:Port
I am using Shipping package. Will try with development or Debug to see if I can get more information about this.