Duplicate submission

[VankiaDirectory]

Hello,
I have an important question:
if a person submitted 2 times an URL, the page submit.php passes this second submission. How can I do to ensure that if a URL is already in the database, it is impossible to re-submitted?

Best Regards

[James]

Version please and IF paid one you will need to add your forum username to your phpLD one

[VankiaDirectory]

Hi James,

the version is v3.3.0

I already add my username on phpld account (i have bought the complete estabilish website with phpld license already installed)
How do I do?

Regards :)

[VankiaDirectory]

Someone can help me please?

PS x James: I can not send PM, how can I send?