Hi,
As of now from PSA to load all delta data to old DSO.
lock ecc system and delete the exist init and load full load data to PSA .
Load full load daa from PSA to New dso--->new cube.
Do the init without data transfer and unlock ecc system.
So now your delta was set and will load to dso's,
while loading full load to new dso, at Psa existing old delta request status need to make red other wise it may leads to duplication at new dso.
Thanks