execute this query
Code:
alter table creature_proto change health minhealth int(30) unsigned not null;
alter table creature_proto add column maxhealth int(30) unsigned not null after minhealth;
update creature_proto set maxhealth=minhealth;
alter table creature_proto change level minlevel int(30) unsigned not null;
alter table creature_proto add column maxlevel int(30) unsigned not null after minlevel;
update creature_proto set maxlevel=minlevel;
alter table creature_proto add column invisibility_type int(30) unsigned not null;
alter table creature_proto add column death_state int(30) unsigned not null;