MySQL master trampling a little pit

Basic situation
Main Library binlog-do-db not filtered
Configure replicate_wild_do_table=dbname.% from Library

Modified the event scheduler for a library dbname2 the main library, and there is no library from the library.
After that, I found an error from the Library show slave status\g.
Error ' Unknown database ' dbname2 ' on query. Default database: ' dbname2 '.
Query: ' ALTER definer= ' root ' @ '% ' EVENT ' productgeneralizetimerjob ' on SCHEDULE every 1 day starts ' 2016-03-27 00:01:00 ' on Completion PRESERVE DISABLE do BEGIN

View Main Library related Binglog
Use ' dbname2 '/*!*/;
SET timestamp=1466156563/*!*/;
Alter event ' Productgeneralizetimerjob ' disable

Suddenly, this replicate_wild_do_table is filtered by the table, but the event is not part of the table, which causes the problem to occur

MySQL master trampling a little pit