Add devices to WirelessLinkForm

netbox/dcim/models/device_components.py

@@ -656,6 +656,10 @@ class Interface(ComponentModel, BaseInterface, LinkTermination, PathEndpoint):
                                  "device, or it must be global".format(self.untagged_vlan)
             })
 
+    @property
+    def _occupied(self):
+        return super()._occupied or bool(self.wireless_link_id)
+
     @property
     def is_wired(self):
         return not self.is_virtual and not self.is_wireless