postgres function "is not unique" [closed]

I am using PostgreSQL 18.0 and I have written a function with default parameters which inserts movie into the table. However, when I add the argument which must be added, it gives error:

SQL Error [42725]: ERROR: function new_movie(text) is not unique Hint: Could not choose a best candidate function. You might need to add explicit type casts. Position: 16

Error position: line: 237 pos: 15

My function definition is something like this:

CREATE OR REPLACE FUNCTION new_movie (m_title text, r_year int DEFAULT EXTRACT(YEAR FROM CURRENT_DATE)::int, l_name text DEFAULT 'Klingon'::text)
RETURNS int
LANGUAGE plpgsql
AS $$

And I have tried to test it with this, but it did not work.

SELECT *
FROM new_movie('Silent Patient'::text);

SELECT *
FROM new_movie('Silent Patient');

How can I fix this problem?