vrbc 7.6 security patch (7.6.0.46000) installation fails

installing vRBC security patch fails:

logs:

/opt/vmware/var/log/vami/vami.log
/opt/vmware/var/log/vami/updatecli.log

pg_dump: dumping contents of table "itfm_cloud_admin.vra_vm_details"
pg_dump: dumping contents of table "itfm_cloud_admin.vra_vm_details_tags"
pg_dump: saving large objects
Dump successful
Stopping VMware vPostgres: ok
MongoDB instance is already upgraded. Aborting upgrade
error: package libyui-ncurses-pkg6-2.46.1-3.4.x86_64 is not installed
error: package perl-Bootloader-YAML is not installed
30/05/2021 7:30:50 [INFO] Update status: Done pre-install scripts
30/05/2021 7:30:50 [INFO] Update status: Running installation tests
30/05/2021 7:30:50 [INFO] Running /opt/vmware/var/lib/vami/update/data/job/15/test_command 
Preparing packages...
	installing package kernel-default-4.12.14-122.26.1.x86_64 needs 4MB on the /boot filesystem
30/05/2021 7:30:51 [ERROR] Failed with exit code 65024
30/05/2021 7:30:51 [INFO] Update status: Running post-install scripts

Cause: the /boot partition ran out of space

Resolution:

Take a snapshot of the vrb appliance and perform the below:

• SSH to vRB VA.
• Create temp directory and move old kernel files.

mkdir /tmp/boot
cd /boot/
mv vmlinu* initrd* /tmp/boot

• re-run the upgrade to the security build