ManagedObject-dbg.js:3553 Uncaught Error: Must not change a property before it has been read
    at constructor.O.setValue (ODataPropertyBinding-dbg.js:701)
    at constructor.P._setBoundValue (PropertyBinding-dbg.js:110)
    at constructor.P.setExternalValue (PropertyBinding-dbg.js:216)
    at f.j.updateModelProperty (ManagedObject-dbg.js:3516)
    at f.j.setProperty (ManagedObject-dbg.js:1300)
    at f.g.setProperty (InputBase-dbg.js:692)
    at f.k.setSelection (ComboBox-dbg.js:1409)
    at f.k.onSelectionChange (ComboBox-dbg.js:820)
    at f.b.fireEvent (EventProvider-dbg.js:228)
    at f.b.fireEvent (Element-dbg.js:531)
O.setValue  @   ODataPropertyBinding-dbg.js:701
P._setBoundValue    @   PropertyBinding-dbg.js:110
P.setExternalValue  @   PropertyBinding-dbg.js:216
j.updateModelProperty   @   ManagedObject-dbg.js:3516
j.setProperty   @   ManagedObject-dbg.js:1300
g.setProperty   @   InputBase-dbg.js:692
k.setSelection  @   ComboBox-dbg.js:1409
k.onSelectionChange @   ComboBox-dbg.js:820
b.fireEvent @   EventProvider-dbg.js:228
b.fireEvent @   Element-dbg.js:531
(anonymous) @   ManagedObjectMetadata-dbg.js:762
s._fireSelectionChangeEvent @   ListBase-dbg.js:1303
s.onItemSelect  @   ListBase-dbg.js:1291
k.informList    @   ListItemBase-dbg.js:362
k.ontap @   ListItemBase-dbg.js:900
b._handleEvent  @   Element-dbg.js:259
U._handleEvent  @   UIArea-dbg.js:924
dispatch    @   jquery-dbg.js:4737
g   @   jquery-mobile-custom-dbg.js:1881
r   @   jquery-mobile-custom-dbg.js:2000
dispatch    @   jquery-dbg.js:4737
c3.handle   @   jquery-dbg.js:4549
trigger @   jquery-dbg.js:7819
(anonymous) @   jquery-dbg.js:7903
each    @   jquery-dbg.js:365
each    @   jquery-dbg.js:137
trigger @   jquery-dbg.js:7902
P   @   jquery-mobile-custom-dbg.js:1452
R   @   jquery-mobile-custom-dbg.js:1462
dispatch    @   jquery-dbg.js:4737
c3.handle   @   jquery-dbg.js:4549