diff --git a/main.go b/main.go
index 33aeb79..231b641 100644
--- a/main.go
+++ b/main.go
@@ -331,15 +331,6 @@ func (d *ofsDriver) Mount(r *volume.MountRequest) (*volume.MountResponse, error)
 								if existingSnapshots, err := parseExistingSnapshots(string(existingSnapshotsB), v.Fs); err == nil {
 									if existingMounts, err := getMountedSnaphots(snapshotsPath); err == nil {
 										log.WithFields(log.Fields{"name": r.Name, "existingMounts": existingMounts}).Trace("Existing snapshot mounts")
-										// Destroy old snapshots
-										for i, name := range setMinus(existingSnapshots, expectedSnapshots) {
-											expectedOutput := "Snapshot '" + name + "' destroyed."
-											if output, err := applyEnv(exec.Command("/sbin/mount.objectivefs", "destroy", name, "-f"), v.Env).Output(); err != nil || strings.TrimSpace(string(output)) != expectedOutput {
-												log.WithFields(log.Fields{"name": r.Name, "snapshot": i}).Warn("Failed to destroy an expired snapshot.")
-											} else {
-												log.WithFields(log.Fields{"name": r.Name, "snapshot": i}).Debug("Snapshot destroyed.")
-											}
-										}
 
 										// Remove mounts of expired snapshots
 										for i, path := range setMinus(existingMounts, expectedSnapshots) {
@@ -353,6 +344,16 @@ func (d *ofsDriver) Mount(r *volume.MountRequest) (*volume.MountResponse, error)
 											}
 										}
 
+										// Destroy old snapshots
+										for i, name := range setMinus(existingSnapshots, expectedSnapshots) {
+											expectedOutput := "Snapshot '" + name + "' destroyed."
+											if output, err := applyEnv(exec.Command("/sbin/mount.objectivefs", "destroy", name, "-f"), v.Env).Output(); err != nil || strings.TrimSpace(string(output)) != expectedOutput {
+												log.WithFields(log.Fields{"name": r.Name, "snapshot": i}).Warn("Failed to destroy an expired snapshot.")
+											} else {
+												log.WithFields(log.Fields{"name": r.Name, "snapshot": i}).Debug("Snapshot destroyed.")
+											}
+										}
+
 										// Add new mounts
 										for i, name := range setMinus(setIntersect(existingSnapshots, expectedSnapshots), existingMounts) {
 											dest := filepath.Join(snapshotsPath, i)
@@ -655,7 +656,7 @@ func isObjectiveFsMount(path string) (bool, error) {
 func setMinus[TKey comparable, TValue any, TValue2 any](a map[TKey]TValue, b map[TKey]TValue2) map[TKey]TValue {
 	var result = make(map[TKey]TValue)
 	for i, j := range a {
-		if _, contains := b[i]; contains {
+		if _, contains := b[i]; !contains {
 			result[i] = j
 		}
 	}