Hi Jorge,
                 My script is as below: (It is providing the required output, but with above mentioned error in ccm.log). Moreover, another dependent value-set also gets saved, but points a red cross mark saying "value is not applicable - not affecting the working though)

dojo.provide("com.ibm.workitems.providers.RequestType");

dojo.require("com.ibm.team.workitem.api.common.WorkItemAttributes");


(function() {
var WorkItemAttributes= com.ibm.team.workitem.api.common.WorkItemAttributes;

dojo.declare("com.ibm.workitems.providers.RequestType", null, {

    getValue: function(attributeId, workItem, configuration) {
      console.log("Start..");
      var aState= workItem.getValue(WorkItemAttributes.STATE);      
      if (aState == "CRWorkflow.state.s16") return "Build and Deploy Request";
      if (aState == "CRWorkflow.state.s17") return "RTC Service Request";         
      return " "; //No Match
    }
});
})();

Thanks.