How to add image and string in database correctly?

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Try reinstalling the app. Reinstalling means, you'll have to completley unistall the app and then do a fresh install of the app.

This error occurs because, while developing the app, if you have made any changes that alter the structure of the database after you have installed the app once, then the older version of the app is unable to find the change.

Thus a reinstall of the app helps..


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