How to update a CLOB?

Hello!

I got a database with a clob.

The database is initated with oracale "load data" and LOBFILE('PATH_TO_A_FILE').

I now need to update a certaion row in this table with a new CLOB.

I got some foregin keys to this row so I can not delete an reinsert it.

Is this possible to update the clob in some way?

I tried like:
UPDATE the_table set clob_column LOBFILE('PATH_TO_A_FILE') where id = 1;

But it does not work.
Any ideas is most welcome.

Best regards
Fredrik