Oracle Message ORA-25186 - INCLUDING clause specified for index-organized table without OVERFLOW

ERRORINCLUDING clause specified for index-organized table without OVERFLOW
CAUSEINCLUDING clause of a CREATE TABLE is an valid option only for index-organized tables with OVERFLOW clause (at creation time) or if an OVERFLOW segment already exists (at ALTER time).
ACTIONSpecify OVERFLOW clause for the index-organized table : For ALTER, perform ADD OVERFLOW first.