about "detached entity" error

[kidder_whw]

The code following
....

for(Check temp:checkTemp)
em.remove(temp);
em.merge(borrow);
for(Check temp:checkList)
em.persist(temp);
....


One of check was Entity,Borrow is Entity,two Bean have not correlative the object ,CheckList is the object for Check's List,the program for em.merge(borrow)had OK forAll administer, but come to for "for em.persist(temp) " was lost


the Exception following:

org.hibernate.PersistentObjectException:
detached entity passed to persist:govfms.ejb.project.C

thanks!

[kidder_whw]

The code following
....

for(Check temp:checkTemp)
em.remove(temp);
em.merge(borrow);
for(Check temp:checkList)
em.persist(temp);
....


One of check was Entity,Borrow is Entity,two Bean have not correlative the object ,CheckList is the object for Check's List,the program for em.merge(borrow)had OK forAll administer, but come to for "for em.persist(temp) " was lost


the Exception following:

org.hibernate.PersistentObjectException:
detached entity passed to persist:govfms.ejb.project.Check

thanks!