How to upload delta after data package deletion?

hi,

I have following problem:

I load ODS with full update then cube with delta from this ODS. Last data package had faulty records and I had to delete it from ODS and cube.

Now I reloaded package with good data. In ODS everything is OK but for cube I recieve error message that I have to initialize my delta again.

Do I have to delete data initialization in ods->cube data package and initialize delta? - I think it causes loading all data from ods to cube again.

Do I have to delete all cube content before?

Regards,

Andrzej