问pg_restore在使用pg_dump备份时指定架构时显示错误

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pg_dump -h IP_ADDRESS -p 5432 -U my_user -Fc my_db  > my_db_allschema.dump

pg_dump -h IP_ADDRESS -p 5432 -U my_user -Fc my_db -n public > my_db_publicschema.dump

postgres@debian:~$ pg_restore -h localhost -p 5432  -U my_user -d my_db my_db_publicschemaonly.dump
pg_restore: while PROCESSING TOC:
pg_restore: from TOC entry 8; 2615 2200 SCHEMA public postgres
pg_restore: error: could not execute query: ERROR:  schema "public" already exists
Command was: CREATE SCHEMA public;


pg_restore: from TOC entry 212; 1259 18102 TABLE abandoned_url real_estate
pg_restore: error: could not execute query: ERROR:  function public.gen_random_uuid() does not exist
LINE 2:     id uuid DEFAULT public.gen_random_uuid() NOT NULL
                            ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
Command was: CREATE TABLE public.abandoned_url (
    id uuid DEFAULT public.gen_random_uuid() NOT NULL
);

CREATE TABLE public.abandoned_url (
        id uuid DEFAULT public.gen_random_uuid() NOT NULL
    );

CREATE TABLE public.abandoned_url (
        id uuid DEFAULT gen_random_uuid() NOT NULL
    );