diff --git a/ironic/drivers/modules/network/common.py b/ironic/drivers/modules/network/common.py
index 9e790d456e..780f5a07e6 100644
--- a/ironic/drivers/modules/network/common.py
+++ b/ironic/drivers/modules/network/common.py
@@ -594,7 +594,8 @@ class NeutronVIFPortIDMixin(VIFPortIDMixin):
         # NOTE(vsaienko): allow to unplug VIFs from ACTIVE instance.
         # NOTE(TheJulia): Also ensure that we delete the vif when in
         # DELETING state.
-        if task.node.provision_state in [states.ACTIVE, states.DELETING]:
+        if task.node.provision_state in [states.ACTIVE, states.DELETING,
+                                         states.AVAILABLE]:
             neutron.unbind_neutron_port(vif_id, context=task.context)
 
     def get_node_network_data(self, task):
diff --git a/ironic/tests/unit/common/test_network.py b/ironic/tests/unit/common/test_network.py
index 0afbe35739..6344252808 100644
--- a/ironic/tests/unit/common/test_network.py
+++ b/ironic/tests/unit/common/test_network.py
@@ -121,7 +121,9 @@ class TestNetwork(db_base.DbTestCase):
     def test_get_node_vif_ids_during_rescuing(self):
         self._test_get_node_vif_ids_multitenancy('rescuing_vif_port_id')
 
-    def test_remove_vifs_from_node(self):
+    @mock.patch.object(neutron_common, 'unbind_neutron_port',
+                       autospec=True)
+    def test_remove_vifs_from_node(self, mock_unp):
         db_utils.create_test_port(
             node_id=self.node.id, address='aa:bb:cc:dd:ee:ff',
             internal_info={driver_common.TENANT_VIF_KEY: 'test-vif-A'})
@@ -134,6 +136,7 @@ class TestNetwork(db_base.DbTestCase):
             result = network.get_node_vif_ids(task)
         self.assertEqual({}, result['ports'])
         self.assertEqual({}, result['portgroups'])
+        self.assertTrue(mock_unp.called)
 
 
 class TestRemoveVifsTestCase(db_base.DbTestCase):
diff --git a/ironic/tests/unit/drivers/modules/network/test_common.py b/ironic/tests/unit/drivers/modules/network/test_common.py
index e4e0d4cd86..13626cec8c 100644
--- a/ironic/tests/unit/drivers/modules/network/test_common.py
+++ b/ironic/tests/unit/drivers/modules/network/test_common.py
@@ -939,7 +939,7 @@ class TestNeutronVifPortIDMixin(db_base.DbTestCase):
         with task_manager.acquire(self.context, self.node.id) as task:
             self.interface.vif_detach(task, 'fake_vif_id')
         mock_get.assert_called_once_with(self.interface, task, 'fake_vif_id')
-        self.assertFalse(mock_unp.called)
+        self.assertTrue(mock_unp.called)
         mock_clear.assert_called_once_with(self.port)
 
     @mock.patch.object(common.VIFPortIDMixin, '_clear_vif_from_port_like_obj',
@@ -954,7 +954,7 @@ class TestNeutronVifPortIDMixin(db_base.DbTestCase):
         with task_manager.acquire(self.context, self.node.id) as task:
             self.interface.vif_detach(task, 'fake_vif_id')
         mock_get.assert_called_once_with(self.interface, task, 'fake_vif_id')
-        self.assertFalse(mock_unp.called)
+        self.assertTrue(mock_unp.called)
         mock_clear.assert_called_once_with(pg)
 
     @mock.patch.object(common.VIFPortIDMixin, '_clear_vif_from_port_like_obj',
diff --git a/releasenotes/notes/vif-detach-in-available-acd744acde91fec9.yaml b/releasenotes/notes/vif-detach-in-available-acd744acde91fec9.yaml
new file mode 100644
index 0000000000..462b9fd46b
--- /dev/null
+++ b/releasenotes/notes/vif-detach-in-available-acd744acde91fec9.yaml
@@ -0,0 +1,9 @@
+---
+fixes:
+  - |
+    Fix an issue in the OpenStack Nova-integrated installation that
+    mac address may conflict at Neutron service during baremetal instance
+    re-scheduling, by allowing VIFs to be unplugged when a node is in
+    the AVAILABLE state. See bug
+    `bug 2109300 <https://bugs.launchpad.net/ironic/+bug/2109300>`_
+    for more details.