How to run 2 instances of one robot for the same currency pair independently.

I have tuned my robot and I found that 2 different sets of parameters works well. Now I would like to run robot with 2 instances for the same currency pair but with different input parameters. How to run them independently ?

I am referring to following line which I have in the code:

             var longPosition = Positions.Find(label, Symbol, TradeType.Buy);

'label' is the same for both instances so for example first instance may find open positions of second instance.

I tried following but it doesn't work:

I created robot parameter to assign custom name:

         [Parameter("Custom name", DefaultValue = "std")]
        public string CustomName { get; set; }

......

         public string label = "test-01DE" + CustomName;

but I receive error:

"Error CS0236: A field initializer cannot reference the non-static field, method, or property 'cAlgo.Robots.RobotDAX.CustomName.get'"

Thanks in advance for any help

SYlwester