“However, one input parameter was left blank when using an internal tool to provision the customer’s Private Cloud. As a result of the blank parameter, the system assigned a then unknown default fixed 1 year term value for this parameter.
After the end of the system-assigned 1 year period, the customer’s GCVE Private Cloud was deleted.”
https://cloud.google.com/blog/products/infrastructure/details-of-google-cloud-gcve-incident