Redefine must be in topological order; this will fail
error: invalid argument: parent s3 for moment s2 not found

correct order
Domain snapshot s3 created from 'snapshot-s3.xml'
Domain snapshot s2 created from 'snapshot-s2.xml'
Name:           s2
Domain:         test
Current:        yes
State:          running
Location:       internal
Parent:         s3
Children:       0
Descendants:    0
Metadata:       yes