This statement tries to create a table with the name that is shown, but one with that name already exists. Only one table with a given name can exist in a single database. (In an ANSI-compliant database, the name of the user that created a table name qualifies it, so one table of a given name per user can exist.)
Check the spelling of the name; if it is as you intended, and you are sure it should not exist, check that you are using the right database. You can review the names of all tables in this database by querying systables as follows:
SELECT tabname FROM systables WHERE tabid > 99
This statement will display only names of permanent tables, not temporary tables. Temporary tables do not appear in systables. If the name does not appear, end your database session and start a new one. Temporary tables will be dropped.