SQL bind error, 6 parameters but requires 0

@justin @william-retool Do you have any idea why this is happening? I've noticed a similar error when I try writing a function for postgres:

do $$
declare
    i int := 0;
    rows_to_insert int := {{inputAddRunCont.value}};
begin
    while @i < rows_to_insert loop
        INSERT INTO container(run_id) VALUES ({{addRun.data.id[0]}});
        i := i + 1;
        end loop;
end $$;

but getting error

bind message supplies 2 parameters, but prepared statement "" requires 0