Error while making CalculatedMultiSelectField

[Zviad Kharazishvili]

Hello, 

I'm using MISC Custom Field plugin and I want to make multi select with values.

I'm using this groovy script:

class OptionType extends Option{
}

def option = new OptionType();
option.optionId = 121212;
option.value = "SomeValue";

return [option];

and after save, field shows me error:

java.lang.IllegalStateException: Field type com.innovalog.jmcf.fields.CalculatedMultiSelectField@503302ed of field AttachementList is not supported.

can anyone help please ?