Tough topic: Logistic DS reinitialization without damaging existing Delta

Dear Experts,

I have the following situation:

Datasource 2LIS_13_VDITM has an existing set of transformation rules to upload data into ODS A, source system X.

I need to make a new set of transformation rules in order to upload data into additional fields of ODS B, source system X (the same).

However:

- Existing PSA stores requests not older than 1 month , I need ALL historical data (4 years)

- ODS A, C, D, E all load data from PSA of source 2LIS_13_VDITM via DELTA

- ODS B is new, and I would like to load all historical data using "Initialization with data transfer"

- I do not want to loose the delta for the other ODSs

- A setup table reinitialization for 2lis_13_vditm is needed via OLI9BW.

Could someone please explain the correct sequence of actions needed in order to have this process executed correctly?

Thank you very much!