I have a created_date_time page item, that I'm trying to pass as to a table timestamp (6) column.
Here is my source :

And here is my rendered value on the form that I'm trying to pass.

But I'm getting the following error.

And I also tried this as localtimestamp:

But I get the following error.

And I cant really use a DB trigger as I will have several records being inserted from the form at the same time.
Example these 3 records should only have one d/t timestamp:

Thanks for any help.
Bob