I am developing a customer module. For that, I coded a  simple form. few days later I coded few more fields and added them in tree as well as form view. when updating or whenever adding new records, the form doesn't show as it should be. Instead of that, it shows the previous form view. But Tree shows all the new fields. To resolve this I need to uninstall and reInstall it or put - U all to solve this thing. any solution for this??? after u all only it shows external ID after some upgrades it doesn't show at all.