There is no need to drop or reload the data ...you are just changing the setting of DSO.
Transformations and DTP will not be affected with this action.
Once the changes are done collect the DSO into TR and transport the same till Production ...
FYI:
If you are on BW 7.3x you have 3 options ...
Create SID's
1) During reporting - if you select this option in future if you build any reports on top of this DSO at the time of reporting SIDs will be generated
2) During Activation - this setting is what u have for Standard DSO
3) Never Create SIDs - this will never create SIDs.
Better way to learn BW is give a try in Sand box system or in TBD to get clear picture how it behaves...if any are not confident create a copy of a DSO and load the data and change the settings after loading and activation of Data is done.
