I have a Tabular Form in my Oracle Apex application. There is a column as UPDATED_DATE. I have set Tabular Form Attributes of this column as below.

When i'm inserting data, UPDATED_DATE column in database table is filling with a value. But when i'm updating existing record, UPDATED_DATE column is not filling with a new value. old date is remaining without changing to a newer data.
How can i solve this ?