Altering multiple column types

Hi,

I'm encountering an issue altering multiple column types in a single ALTER
TABLE

psql (12beta2, server 11.4)
Type "help" for help.
test=# create table users(id serial primary key, name varchar(255),
age int, email varchar(255));
CREATE TABLEtest=# create index users_name_idx on users(name);
CREATE INDEXtest=# create index users_email_idx on users(email);
CREATE INDEXtest=# alter table users alter column name type text,
alter column email type text;
psql: ERROR: relation "users_name_idx" already exists
test=# alter table users alter column name type text;
ALTER TABLE
test=# alter table users alter column email type text;
ALTER TABLE

Is there a limitation I'm missing in the docs ?

https://www.postgresql.org/docs/11/sql-altertable.html

Thanks