Sync table error if create custom index key

[appleboy]

Create a custom index key on a table:

				if _, err := x.Exec("CREATE INDEX ll_idx on machine USING gist(ll_to_earth(lat, lng));"); err != nil {
					log.Fatal().Err(err).Msgf("can't index for gist lat lng")
				}

output the following errors after restarting service:

error="sync database struct error: Unknown col ll_to_eart in index ll_idx of table machine, columns [id name lat lng created_at updated_at]"

source code:

	if err = x.StoreEngine("InnoDB").Sync2(tables...); err != nil {
		return fmt.Errorf("sync database struct error: %v", err)
	}

	m := migrate.New(x, migrate.DefaultOptions, migrations)
	if err = m.Migrate(); err != nil {
		return fmt.Errorf("migrate: %v", err)
	}

[lunny]

Why ll_to_eart not ll_to_earth?