Clearing fields when duplicating a Record

Hi all;

I was wondering if there is anywhay to clear some fields on a record when it is duplicated.

I meant, some of them are usefull but others need to be different.

Duplicating a record saves a lot of time, but if I could also clear some of the fields someway it would also save a lot more.

Thank you.

There aren’t standard decision, only custom code.