Upgrading from Extjs 4.2 to Extjs 5 (compatibility issues...)

Hi All,

I specify the compatibility version app.json,

compatibility: { ext: '4.2'

},

but still I am getting following errors. Do i have to modify the code to get rid of these errors. ? Thanks

Uncaught Error: [Ext.createByAlias] Unrecognized alias: data.field.double

(This is coming from model class & it is complaining about double data type)



Uncaught Error: Duplicate entity name "Summary": MyApp.model.forExport.Summary and MyApp.model.summary.Summary

( I have same class name in different packages(folders) , it works in Extjs 4.2)