How to prevent "A request for the item is now pending."

Hello guys,

Im getting this error very often, is there any solution to this?

Error: Item requested is not available. A request for the item is now pending.
    at mx.data::ConcreteDataService/resolveReference()[C:\depot\DataServices \trunk\frameworks\projects\data\src\mx\data\ConcreteDataService.as:220 3]
    at mx.data.utils::Managed$/getProperty()[C:\depot\DataServices\trunk\fra meworks\projects\data\src\mx\data\utils\Managed.as:183]
    at sgrh::_Super_Empresa/get actividade()[C:\wlcds\sgrh\src\sgrh\_Super_Empresa.as:198]
    at mx.data.utils::Managed$/internalCompare()[C:\depot\DataServices\trunk \frameworks\projects\data\src\mx\data\utils\Managed.as:648]
    at mx.data.utils::Managed$/arrayCompare()[C:\depot\DataServices\trunk\fr ameworks\projects\data\src\mx\data\utils\Managed.as:696]
    at mx.data.utils::Managed$/internalCompare()[C:\depot\DataServices\trunk \frameworks\projects\data\src\mx\data\utils\Managed.as:608]
    at mx.data.utils::Managed$/http://www.adobe.com/2006/flex/mx/internal::compare()[C:\depot\DataServices\trunk\frameworks\projects\data\src\mx\data\ut ils\Managed.as:522]
    at mx.data::ConcreteDataService/http://www.adobe.com/2006/flex/mx/internal::getDataListWithFillParams()[C:\depot\DataServices\trunk\frameworks\projects\data\src\mx\data\Co ncreteDataService.as:3751]
    at mx.data::ConcreteDataService/internalFill()[C:\depot\DataServices\tru nk\frameworks\projects\data\src\mx\data\ConcreteDataService.as:7178]
    at Function/<anonymous>()[C:\depot\DataServices\trunk\frameworks\project s\data\src\mx\data\ConcreteDataService.as:1317]
    at mx.data::ConcreteDataService/fill()[C:\depot\DataServices\trunk\frame works\projects\data\src\mx\data\ConcreteDataService.as:1336]
    at mx.data::DataManager/fill()[C:\depot\DataServices\trunk\frameworks\pr ojects\data\src\mx\data\DataManager.as:1560]
    at _Super_FuncionarioService/getByEmpresa()[C:\wlcds\sgrh\src\sgrh\_Supe r_FuncionarioService.as:341]
    at mz.mysoft.sgrh.telas::ListaFuncionarios/reset_clickHandler()[C:\wlcds \sgrh\src\mz\mysoft\sgrh\telas\ListaFuncionarios.mxml:58]
    at mz.mysoft.sgrh.telas::ListaFuncionarios/__reset_click()[C:\wlcds\sgrh \src\mz\mysoft\sgrh\telas\ListaFuncionarios.mxml:84]

Regards,

Imraan