Error in SelectOneChoise inside the table when its atributes are updatable

Question

I have a table in my page, this table is referenced with a VO. This table have a colunms with SelectOneChoise. The user select a item in that SelectOneChoise and click on "Save" Button, and my application make a update in table.
But a itens in this SelectOneChoise can change when the user changes a value on the other SelectOneChoise in page.
Example:
US: California / New York ( <- this is a SelectOneChoise with 2 itens [ California and New York ] )
Table
Id - People Name - City
1 - Ricky - [if California is selected, then show Cities of California, else show New York's Cities]
2 - Bianca - [if California is selected, then show Cities of California]
When the user change a value of SelectOneChoise of US, the Cities inside the table are updatable automatically.
My problema is:
When i update the citys in table, return that Error:
03/02/2009 11:36:35 oracle.adfinternal.view.faces.renderkit.core.xhtml.PanelPartialRootRenderer encodeAll
SEVERE: Error during partial-page rendering
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
     at java.util.ArrayList.RangeCheck(ArrayList.java:546)
     at java.util.ArrayList.get(ArrayList.java:321)
     at oracle.adf.view.faces.component.UIXCollection.restoreStampState(UIXCollection.java:800)
     at oracle.adf.view.faces.component.UIXTable.restoreStampState(UIXTable.java:431)
But, this only happens when a US has a smaller number of cities that the current.

Answer 1

The error only happens when the state that has fewer towns that chose the previous state.
For example:
Initially, the state chosen begins empty.
If the user selects the state 1 (with 5 cities)
OK, it works 5 cities is greater than 0
If the user selects the state 2 (with 8 cities)
OK, it works as 8 cities is greater than 5
If the user selects the state 3 (with 4 cities)
ERROR because 4 is less than 8 cities
That error i show in imagem above.