How to delete Change log data from a DSO?

Hello Experts,

I am trying to delete the change log data for a DSO which has some 80 Cr records in it.

I am trying to follow the standard procedure by using the process chain variant and giving the no.of days but somehow data is not getting deleted.

However the process chain is completing successfully with G state.

Please let me know if there are any other ways to delete the data.

Thanks in Advance.

Thanks & Regards,

Anil.