I have two entites User and Permissions with one to many relationship as below. In UserEntity ejb I have this code: @OneToMany(mappedBy = "user", cascade = {CascadeType.PERSIST, CascadeType.MERGE}) | public List<PermissionEntityEJB> getPermissions() { | return this.permissions; | } | And on permissions entity ejb I have this code for relationship: @ManyToOne | @JoinColumn(name = "USER_ID", nullable = false) | public UserEntityEJB getUser() { | return this.user; | } | When I try to update the user's permissions I create a list of PermissionsEntity objects (that includes setting the user attribute to the current User Entity ejb) and then call the setter on User Entity ejb using syntax like below: | usrEntity.setPermissions(permissionsList) | After the committing of transaction in the database I see a new set permissions added on the user's current permissions. I was expecting to see in the database only the new set of permissions (the current/old set of permissions should have been deleted). Am I seeing the expected behavior or Am I doing something wrong or my relationship setup is not ok. Do I need to explicitly delete the current/old permissions myself before adding the new set of permissions? -Navjeet View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4077006#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...