SQL & PL/SQL

I need a PL/SQL code that would to this:

1. go through all rows in a table T1 (columns c1, c2)
2. insert them into table T2 (columns c1, c2 both set as a composite primary key)
3. if a row from T1 already exists in T2 and would violate PK constraint on T2 either skip this row or ignore error and continue with a next row from T1

I have this so far:

SET SERVEROUTPUT ON
DECLARE
sr_rec v$sql%ROWTYPE;
BEGIN
FOR sr_rec IN (
SELECT *
FROM v$sql)
LOOP
INSERT INTO sql_repository(sql_id, hash_value)
VALUES (sr_rec.sql_id, sr_rec.hash_value);
COMMIT;
END LOOP;
EXCEPTION
WHEN OTHERS THEN
NULL;
END;
/

But this PL/SQL encounters an exception and exits. I need something that either check whether the same sql_id, hash_vale already exist in sql_repository and then skips that row, or quietly ignores exceptions and continues further down the v$sql view.

Any advice is greatly appreciated. Thank you for your time.

DanielD