table "<str>" has data in it

  Explanation:  You attempted to create or drop a storage map  for
  a table that contains data, and that operation is not allowed.

  User Action:  If this error  was  reported  for  DROP  then  you
  should  drop  the  table  to delete the data.  If this error was
  reported from CREATE then check that the map being defined is  a
  simple map (see secondary message).