upgrading SAP portal 7.02 to 7.4 did we need to recreate iviews

Hi Team,

  We have one SAP Portal 7.02 version & in  Backend EHP5 ECC system.

Now we are upgrading portal 7.02 to 7.4 version.  In Portal 7.02 all iviews/Workset/Roles  already created.

Did we need to re-create all iviews/Workset/Roles in SAP portal 7.4 version Manually.  ( ECC EHP7 we are using in Background.)

OR

will It work using Import & Export.  If we exports all iviews from 7.02 & Import into portal 7.4.

or version will create any problem.?

Regards,

Pankaj Kamble