diff --git a/net/haproxy/Makefile b/net/haproxy/Makefile
index fa8508ba7..c2f195fc2 100644
--- a/net/haproxy/Makefile
+++ b/net/haproxy/Makefile
@@ -1,5 +1,5 @@
 PLUGIN_NAME=		haproxy
-PLUGIN_VERSION=		3.0
+PLUGIN_VERSION=		3.1
 PLUGIN_COMMENT=		Reliable, high performance TCP/HTTP load balancer
 PLUGIN_DEPENDS=		haproxy
 PLUGIN_MAINTAINER=	opnsense@moov.de
diff --git a/net/haproxy/pkg-descr b/net/haproxy/pkg-descr
index 4e83fe306..69ef2148a 100644
--- a/net/haproxy/pkg-descr
+++ b/net/haproxy/pkg-descr
@@ -6,6 +6,14 @@ very high loads while needing persistence or Layer7 processing.
 Plugin Changelog
 ================
 
+3.1
+
+Fixed:
+* fix items that cannot be deleted (#2266)
+
+Changed:
+* rules: only accept a single value for backend/server fields (#2266)
+
 3.0
 
 Added:
diff --git a/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml b/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml
index 8c172b6cf..58ac8e28e 100644
--- a/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml
+++ b/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml
@@ -1,6 +1,6 @@
 <model>
     <mount>//OPNsense/HAProxy</mount>
-    <version>3.0.0</version>
+    <version>3.1.0</version>
     <description>the HAProxy load balancer</description>
     <items>
         <general>
@@ -2086,7 +2086,7 @@
                         </template>
                     </Model>
                     <ValidationMessage>Related backend item not found</ValidationMessage>
-                    <Multiple>Y</Multiple>
+                    <Multiple>N</Multiple>
                     <Required>N</Required>
                 </use_backend>
                 <use_server type="ModelRelationField">
@@ -2098,7 +2098,7 @@
                         </template>
                     </Model>
                     <ValidationMessage>Related server item not found</ValidationMessage>
-                    <Multiple>Y</Multiple>
+                    <Multiple>N</Multiple>
                     <Required>N</Required>
                 </use_server>
                 <http_request_auth type="TextField">
diff --git a/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/Migrations/M3_1_0.php b/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/Migrations/M3_1_0.php
new file mode 100644
index 000000000..a41024c00
--- /dev/null
+++ b/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/Migrations/M3_1_0.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ *    Copyright (C) 2021 Frank Wall
+ *
+ *    All rights reserved.
+ *
+ *    Redistribution and use in source and binary forms, with or without
+ *    modification, are permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice,
+ *       this list of conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *
+ *    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ *    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ *    AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ *    AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ *    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ *    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ *    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *    POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+namespace OPNsense\HAProxy\Migrations;
+
+use OPNsense\Base\BaseModelMigration;
+
+class M3_1_0 extends BaseModelMigration
+{
+    public function run($model)
+    {
+        foreach ($model->getNodeByReference('actions.action')->iterateItems() as $action) {
+            switch ((string)$action->type) {
+                case 'use_backend':
+                    // do nothing, keep the value
+                    break;
+                case 'use_server':
+                    // do nothing, keep the value
+                    break;
+                default:
+                    // Clear referenced items if they are not in use.
+                    $action->use_backend = null;
+                    $action->use_server = null;
+                    break;
+            }
+        }
+    }
+}