2711274 - Error message appears when you are trying to assign a resource to a Resource Group

While assigning a Resource DEF (DEF refers to resource id) to a New Resource Group KLM (KLM refers to resource group id),Error appears.

SAP Business ByDesign

Cannot assign planning resource DEF to a planning resource group, Resource assignment to a New Resource Group, Resource Relevant for Capacity Planning,Cannot assign planning resource to a planning resource group , KBA , cannot assign planning resource , resource relevant for capacity planning , planning resource group , planning resource & resource group , AP-RDM , Resource Data Management , Problem