Why skipped a materialize view the inner table

Hi,

I create a materialized view like this:

create table t_data (id number,text varchar2(20));

create materialized view MV_TEST_16232

refresh complete on demand

as

select id,text from t_data;

This generate an ORA-16232 on the standby database:

ORA-16232: adding Logical Standby skip entry for table T_DATA

Can you explain this?