pd.io.sql.to_sql  can't find the existing table
this is my code:
pd.io.sql.to_sql(df, "TMP_ACCOUNT", con, if_exists='append', index=False)
this is my error:
(teradata.api.DatabaseError) (3803, "[42S01] [Teradata][ODBC Teradata Driver][Teradata Database] Table 'TMP_ACCOUNT' already exists. ") 

My database is teradata   ,and table "TMP_ACCOUNT" is a VOLATILE MULTISET  TABLE。Before i use pd.io.sql.to_sql i have created the table "TMP_ACCOUNT".  Anyone can fix my issue???thanks.
