Data processor source Contribution issue
When we add Contribution as Data Processor Source, then we are getting following Error
Civi\DataProcessor\DataSpecification\FieldExistsException: "Field "total_amount" already exists"
#0 sites/default/files/civicrm/extensions/dataprocessor/Civi/DataProcessor/DataSpecification/Utils.php(103): Civi\DataProcessor\DataSpecification\DataSpecification->addFieldSpecification("total_amount", Object(Civi\DataProcessor\DataSpecification\CustomFieldSpecification)) #1 (closed) sites/default/files/civicrm/extensions/dataprocessor/Civi/DataProcessor/Source/AbstractCivicrmEntitySource.php(157): Civi\DataProcessor\DataSpecification\Utils::addCustomFieldsToDataSpecification("Contribution", Object(Civi\DataProcessor\DataSpecification\DataSpecification), TRUE, "_") #2 (closed) sites/default/files/civicrm/extensions/dataprocessor/Civi/DataProcessor/Source/AbstractCivicrmEntitySource.php(306): Civi\DataProcessor\Source\AbstractCivicrmEntitySource->loadCustomGroupsAndFields(Object(Civi\DataProcessor\DataSpecification\DataSpecification), TRUE) #3 (closed) sites/default/files/civicrm/extensions/dataprocessor/Civi/DataProcessor/Source/AbstractSource.php(191): Civi\DataProcessor\Source\AbstractCivicrmEntitySource->getAvailableFilterFields() #4 (closed) sites/default/files/civicrm/extensions/dataprocessor/CRM/Dataprocessor/Form/Source.php(92): Civi\DataProcessor\Source\AbstractSource->hasConfiguration() #5 (closed) sites/all/modules/civicrm/CRM/Core/Form.php(585): CRM_Dataprocessor_Form_Source->preProcess() #6 sites/all/modules/civicrm/CRM/Core/StateMachine.php(136): CRM_Core_Form->buildForm() #7 (closed) sites/all/modules/civicrm/CRM/Core/QuickForm/Action/Next.php(61): CRM_Core_StateMachine->perform(Object(CRM_Dataprocessor_Form_Source), "next", "Next") #8 (closed) sites/all/modules/civicrm/packages/HTML/QuickForm/Controller.php(203): CRM_Core_QuickForm_Action_Next->perform(Object(CRM_Dataprocessor_Form_Source), "next") #9 (closed) sites/all/modules/civicrm/packages/HTML/QuickForm/Page.php(103): HTML_QuickForm_Controller->handle(Object(CRM_Dataprocessor_Form_Source), "next") #10 (closed) sites/all/modules/civicrm/CRM/Core/Controller.php(351): HTML_QuickForm_Page->handle("next") #11 (closed) sites/all/modules/civicrm/CRM/Utils/Wrapper.php(114): CRM_Core_Controller->run() #12 (closed) sites/all/modules/civicrm/CRM/Core/Invoke.php(284): CRM_Utils_Wrapper->run("CRM_Dataprocessor_Form_Source", "DataProcessor", (Array:0)) #13 (closed) sites/all/modules/civicrm/CRM/Core/Invoke.php(85): CRM_Core_Invoke::runItem((Array:13)) #14 sites/all/modules/civicrm/CRM/Core/Invoke.php(52): CRM_Core_Invoke::_invoke((Array:4)) #15 (closed) sites/all/modules/civicrm/drupal/civicrm.module(444): CRM_Core_Invoke::invoke((Array:4)) #16 (closed) includes/menu.inc(527): civicrm_invoke("dataprocessor", "form", "source") #17 (closed) index.php(21): menu_execute_active_handler() #18 (closed) {main}