SASI index on partition key part doesn't match

cqlsh:test> CREATE TABLE test1(name text, event_date date, data_type text, bytes int, PRIMARY KEY ((name, event_date), data_type));
cqlsh:test> CREATE CUSTOM INDEX test_index ON test1(name) USING 'org.apache.cassandra.index.sasi.SASIIndex';
cqlsh:test> INSERT INTO test1(name, event_date, data_type, bytes) values('1234', '2010-01-01', 'sensor', 128);
cqlsh:test> INSERT INTO test1(name, event_date, data_type, bytes) values('abcd', '2010-01-02', 'sensor', 500);
cqlsh:test> select * from test1 where NAME = '1234';

 name | event_date | data_type | bytes
------+------------+-----------+-------

(0 rows)
cqlsh:test> CONSISTENCY ALL;
Consistency level set to ALL.
cqlsh:test> select * from test1 where NAME = '1234';

 name | event_date | data_type | bytes
------+------------+-----------+-------

(0 rows)