In this post, you’ll learn more about the Oracle ErrorORA-01491: CASCADE option not valid with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-01491: CASCADE option not valid
Reason for the Error ORA-01491: CASCADE option not valid
The CASCADE option is only valid for tables or clusters.
How to fix the Error ORA-01491: CASCADE option not valid ?
You can fix this error in Oracle by following the below steps
Do not specify CASCADE