Modify round processing to not attempt to access rounds when we are working...

Modify round processing to not attempt to access rounds when we are working with contact versions that are 0

auth/store/receivedRequest.go

 package store
 
 import (
-	"os"
 	"sync"
 
 	"github.com/cloudflare/circl/dh/sidh"
@@ -76,12 +75,12 @@ func loadReceivedRequest(kv *versioned.KV, partner *id.ID) (
 			partner)
 	}
 
-	round, err := rounds.LoadRound(kv, makeRoundKey(partner))
-	if err != nil {
-		if contactVersion == 0 && os.IsNotExist(err) {
-			jww.WARN.Printf("Old contact version, round to nil")
-			round = rounds.Round{}
-		} else {
+	round := rounds.Round{}
+	if contactVersion == 0 {
+		jww.WARN.Printf("Old contact version, round to nil")
+	} else {
+		round, err = rounds.LoadRound(kv, makeRoundKey(partner))
+		if err != nil {
 			return nil, errors.WithMessagef(err, "Failed to Load "+
 				"round request was received on with %s",
 				partner)