diff --git a/pkg/compute/models/guestnetworks.go b/pkg/compute/models/guestnetworks.go
index 01dde8acaf..9799e8f09f 100644
--- a/pkg/compute/models/guestnetworks.go
+++ b/pkg/compute/models/guestnetworks.go
@@ -344,7 +344,8 @@ func (manager *SGuestnetworkManager) newGuestNetwork(
 					return nil, errors.Wrap(err, "GetFreeIPv4")
 				}
 				if len(address) > 0 && ipAddr != address && requiredDesignatedIp {
-					return nil, errors.Wrapf(httperrors.ErrConflict, "candidate ip %s is occupied!", address)
+					usedAddr, _ := network.GetUsedAddressDetails(ctx, address)
+					return nil, errors.Wrapf(httperrors.ErrConflict, "candidate ip %s is occupied with %#v!", address, usedAddr)
 				}
 				gn.IpAddr = ipAddr
 			}
@@ -398,7 +399,8 @@ func (manager *SGuestnetworkManager) newGuestNetwork(
 					return nil, errors.Wrap(err, "GetFreeIPv6")
 				}
 				if len(address6) > 0 && ip6Addr != address6 && !derived && requiredDesignatedIp {
-					return nil, errors.Wrapf(httperrors.ErrConflict, "candidate v6 ip %s is occupied!", address6)
+					usedAddr, _ := network.GetUsedAddressDetails(ctx, address6)
+					return nil, errors.Wrapf(httperrors.ErrConflict, "candidate v6 ip %s is occupied with %#v!", address6, usedAddr)
 				}
 				gn.Ip6Addr = ip6Addr
 			}
diff --git a/pkg/compute/models/networks.go b/pkg/compute/models/networks.go
index 291bcbc16a..353dc4dd3f 100644
--- a/pkg/compute/models/networks.go
+++ b/pkg/compute/models/networks.go
@@ -3458,19 +3458,38 @@ func (network *SNetwork) GetDetailsAddresses(
 	return output, nil
 }
 
+func (network *SNetwork) GetUsedAddressDetails(ctx context.Context, addr string) (*api.SNetworkUsedAddress, error) {
+	address, err := network.GetAddressDetails(ctx, nil, nil, rbacscope.ScopeSystem)
+	if err != nil {
+		return nil, errors.Wrapf(err, "GetAddressDetails")
+	}
+	for i := range address {
+		if address[i].IpAddr == addr || address[i].Ip6Addr == addr {
+			return &address[i], nil
+		}
+	}
+	return nil, errors.Wrapf(errors.ErrNotFound, addr)
+}
+
+func (network *SNetwork) GetAddressDetails(ctx context.Context, userCred mcclient.TokenCredential, owner mcclient.IIdentityProvider, scope rbacscope.TRbacScope) ([]api.SNetworkUsedAddress, error) {
+	netAddrs := make([]api.SNetworkUsedAddress, 0)
+	q := network.getUsedAddressQuery(ctx, userCred, owner, scope, false)
+	err := q.All(&netAddrs)
+	if err != nil {
+		return nil, httperrors.NewGeneralError(err)
+	}
+	sort.Sort(SNetworkUsedAddressList(netAddrs))
+	return netAddrs, nil
+}
+
 func (network *SNetwork) fetchAddressDetails(ctx context.Context, userCred mcclient.TokenCredential, owner mcclient.IIdentityProvider, scope rbacscope.TRbacScope) (api.GetNetworkAddressesOutput, error) {
 	output := api.GetNetworkAddressesOutput{}
 	{
-		netAddrs := make([]api.SNetworkUsedAddress, 0)
-		q := network.getUsedAddressQuery(ctx, userCred, owner, scope, false)
-		err := q.All(&netAddrs)
+		var err error
+		output.Addresses, err = network.GetAddressDetails(ctx, userCred, owner, scope)
 		if err != nil {
-			return output, httperrors.NewGeneralError(err)
+			return output, err
 		}
-
-		sort.Sort(SNetworkUsedAddressList(netAddrs))
-
-		output.Addresses = netAddrs
 	}
 	{
 		netAddrs6 := make([]api.SNetworkUsedAddress, 0)