ALTER TABLE registry_request
    ADD COLUMN if not exists person_import_request_stamp bigint;

ALTER TABLE registry_request
    ADD COLUMN if not exists subpoena_import_request_stamp bigint;

ALTER TABLE registry_request
    ADD COLUMN if not exists person_history_status_stamp bigint;

ALTER TABLE registry_request
    ADD COLUMN if not exists subpoena_history_status_stamp bigint;

ALTER TABLE registry_request
    ADD COLUMN if not exists print_request_stamp bigint;

ALTER TABLE registry_request
    ADD COLUMN if not exists sign_request_stamp bigint;