Unclear error "DELETE query is not supported" LWD + projection

[den-crane]

CREATE TABLE users (uid Int16, name String, age Int16, projection p1 (select count(), age group by age))
ENGINE=MergeTree order by uid;

INSERT INTO users VALUES (1231, 'John', 33);
INSERT INTO users VALUES (6666, 'Ksenia', 48);
INSERT INTO users VALUES (8888, 'Alice', 50);

delete from users where 1;

 DB::Exception: DELETE query is not supported for table default.users. (BAD_ARGUMENTS)

https://fiddle.clickhouse.com/37c7eadc-9aee-470c-a00c-721fb5648841

[jensenity]

Getting the same error here too once I added projection into my MergeTree table.