SAP BW DTP setting options

Hi,

We have changed the setting of an DTP from 'Get one Request only' to 'Get all new data request by request'. the DTP is getting data from source system and already transported from D system to Q system. After some test we decide to change it back to the first setting, but the option 'Get only one request' is disappeared as you see the screenshots before and after change. Can any one tell me how to get the option 'Get only one request' back? Thanks I appreciate any help.