SolusVM 2 VM resize via Configurable options does not work in WHMCS prepaid module: The current disk size is greater than you want to resize to

Symptoms 

Upgrade via Configurable options does not work in WHMCS prepaid module. The following error is displayed in WHMCS with enabled debug:

CONFIG_TEXT: GuzzleHttp\Exception\ClientException: Client error: `POST https://example.com/api/v1/servers/35/resize` resulted in a `49529521395213188595213188395295213952131885952131883 Unprocessable Content` response:
{"message":"The current disk size 30 GB is greater than 10 GB you want to resize to. You cannot downgrade to a plan with (truncated...)
in /home/inveeble/public_html/accounts/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php:111

Cause

WHMCS module bug with ID #SIO-5930 which was fixed in module version 1.0.32

Resolution

Update module to the latest version