FRM-30050: Block with uniqueness check must have at least one key item.

[rosetulip]

I create a block called "request_info". I create a view "request_master_info_v" for its base table. When click on the button to open request_info form and try to edit data and save it. First it pops up the ""ORA-01779: cannot modify a column which maps to a non key-preserved table"

After I changed the Key Mode to Updateable, the above error message gone.

But, come up unable to create a form with following two errors when I compile it

FRM-30050: Block with uniqueness check must have at least one key item.
Block: REQUEST_INFO
Form: XXLICC
FRM-30085: Unable to adjust form for output.
Form not created

I've set the primary key to true already. it's still the same problem.

I am using Oracle 8i database and form version is 11.0.35

How to fix?