RDS upgrade for mariadb AllowMajorVersionUpgrade error

Question

I am attempting to upgrade my RDS MariaDB from 10.3 to 10.11 according to the directions here under "Manually ...":
https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Upgrading.html

When I click the final "Modify DB instance" button, I get an error stating:
"We're sorry, your request to modify DB instance ***** has failed.
The AllowMajorVersionUpgrade flag must be present when upgrading to a new major version."

Where can I set that flag?

Answer

Hello.

I have also experienced the same error in the past.  
For unknown reasons, I couldn't do it from the management console, so I upgraded using the AWS CLI.  
https://awscli.amazonaws.com/v2/documentation/api/latest/reference/rds/modify-db-instance.html  
```
aws rds modify-db-instance --db-instance-identifier "RDS-Name" --engine-version "Version" --db-parameter-group-name "Parameter-Group" --allow-major-version-upgrade --apply-immediately --region ap-southeast-2
```

RDS upgrade for mariadb AllowMajorVersionUpgrade error

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