We have Google Kubernetes cluster setup with 2 node pools , today we have noticed that the first node pool min node value has changed from 2 to 1 node , we have confirmed with our team and as per our discussion it has not been updated by our end , now we need to find out how this value has been changed, please help

1. node pool 1 - 
instance type - g1-small
min instance - 2 
auto scale - scale upto 5

2. node pool 2
instance type - n1-standard-1
min instance - 2 
auto scale - scale upto 3