SQL : how to remove duplicate rows from tables

DELETE FROM ttrss_entries
WHERE id IN
(
    WITH
        req_titles AS
        (
            SELECT
                id,
                MD5(title) md5title
            FROM
                ttrss_entries
        ),
        req_doublons AS
        (
            SELECT md5title,MIN(ID) minid FROM req_titles
            GROUP BY md5title
            HAVING COUNT(md5title)>1
        )
    SELECT id FROM req_titles
    WHERE md5title IN
    (
        SELECT md5title FROM req_doublons
    )
    EXCEPT
    SELECT minid FROM req_doublons
);