The county clerk shall keep a record of all special tax bills issued under the provisions of sections 249.430 to 249.660, said record to contain a description of the land covered by each special tax bill, the amount assessed against the same, and the date of the issue thereof and the rate of interest thereon, and also the name of the respective owners of the tracts of land described in said tax bills, as shown by the tax books in the office of the county collector, but any error in such record shall not affect the validity of said special tax bills.