Despite the fact that Magento has the
<version> inside of it’s config files (with the exception of a newer mysql install file e.g. mysql4-install-1.1.0.php), it doesn’t check this and reload a new module when installed. If you need to reload the module and database setup then go to the database table
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Then clear Magento’s cache.
Always make sure to change the version of your install script before deploying. But while developing it is easier to drop the record from