diff --git a/pkg/compute/models/guestnetworks.go b/pkg/compute/models/guestnetworks.go
index 4f249c428a..2e712a0d3a 100644
--- a/pkg/compute/models/guestnetworks.go
+++ b/pkg/compute/models/guestnetworks.go
@@ -392,7 +392,7 @@ func (manager *SGuestnetworkManager) newGuestNetwork(
 					}
 				}
 
-				ip6Addr, err := network.GetFreeIP(ctx, userCred, addrTable, recentAddrTable, address, allocDir, reserved, api.AddressTypeIPv6)
+				ip6Addr, err := network.GetFreeIP(ctx, userCred, addrTable, recentAddrTable, address6, allocDir, reserved, api.AddressTypeIPv6)
 				if err != nil {
 					return nil, errors.Wrap(err, "GetFreeIPv6")
 				}
diff --git a/pkg/compute/models/networks.go b/pkg/compute/models/networks.go
index ec9b615c97..6c80a1a98c 100644
--- a/pkg/compute/models/networks.go
+++ b/pkg/compute/models/networks.go
@@ -341,7 +341,7 @@ func (snet *SNetwork) getFreeIP6(addrTable map[string]bool, recentUsedAddrTable
 			return "", errors.Wrap(err, "NewIPV6Addr")
 		}
 		if !iprange.Contains(candIP) {
-			return "", httperrors.NewInputParameterError("candidate %s out of range", candidate)
+			return "", httperrors.NewInputParameterError("candidate %s out of range %s", candidate, iprange.String())
 		}
 		if _, ok := addrTable[candidate]; !ok {
 			return candidate, nil