When trying to copy a documenttype, I get another error in 4.7.1.1 when using SQL CE:

Error running NonQuery:
SQL Statement:
update cmsContentType set description = @description where nodeId = @id

Exception:
System.ArgumentNullException: Parameterized query 'update cmsContentType set description = @description where nodeId = @id' expects a parameter value which was not supplied.
Parameter name: @description
  at System.Data.SqlServerCe.SqlCeCommand.FillParameterDataBindings(Boolean verifyValue)
  at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options)
  at System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQuery()
  at SqlCE4Umbraco.SqlCeApplicationBlock.ExecuteNonQuery(String connectionString, CommandType commandType, String commandText, SqlCeParameter[] commandParameters)