extjs - Updated records don't match Store.sync() -


i having trouble when updating store

ext.define("manageshows.model.show", { extend: "ext.data.model", config: {     idproperty: 'id',     fields: [         { name: 'id' , type: 'int'},         { name: 'name', type: 'string' }     ],     validations: [         { type: 'presence', field: 'name', message: 'please enter name show.'}     ] } });

when try sync() error 

[warn][ext.data.operation#process] unable match updated record came server.

the list holding data contains duplicate entries of first element in list. if refresh page list displays correctly updated term.

i don't know part of records don't match. different can see store.id = "ext-record-4" seem auto generated , not saving value in database store.data.id = {id database}.

how can find not matching?

edit: important note error 7 times in row , have 8 entries. if updated first entry changes work , displayed corrently

i stopped servlet returning json data after sync() call. wasn't need because sencha touch updates data locally automatically


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