DB drop after HPOM upgrade

Hi All,


I was performed the upgrade procedure on my HPOM 8.35 and upgrade to HPOM 9.2.


I was referring to "HPOM_9.20_Installation_Guide_HP-UX.pdf".


After the core upgrade, I noted that the db was completely deleted.
Why the upgrade procedure did drop the db?


Note that I had Oracle Database Version 11g.


Thank you so much