Oracle Message ORA-13231 - failed to create index table [string] during R-tree creation

ERRORfailed to create index table [string] during R-tree creation
CAUSEThe specified index table either already exists or there is not enough tablespace.
ACTIONDelete the table if it already exists and verify if the current user has CREATE TABLE privileges and has sufficient space in the default or specified tablespace. If that fails to correct the problem, contact Oracle Support Services.