Growfs /dev/ada0p2 on AWS on 10.3

[Alvaro Pereyra]

Good evening,

I have followed the following article to a tee:
https://www.freebsd.org/doc/handbook/disks-growing.html

But, am still unable to expand the size of my file system using the
following command:

growfs */dev/ada0p2*

Even after using the following command:

sysctl kern.geom.debugflags=16

I get the following error:

growfs: /dev/ada0p2: Operation not permitted


Please advise,

Thanks,