-g flag is in the optional section in the doc, but running it on command line says otherwise

https://docs.couchbase.com/server/current/tools/cbimport-csv.html

The doc says -g flag is optional , but when I run the command without -g the help text on command line shows this

cbimport csv -c couchbase://52.43.59.141 -u Administrator -p password -b s3analytics -d file://mnt/tmp/customer_subscriber_report_2021-02-28_new.csv
Flag required, but not specified: g/-generate-key

cbimport csv [<args>]

Reporter: Rekha Nair
E-mail: rekha.nair@couchbase.com