diff --git a/abonapp/locale/ru/LC_MESSAGES/django.po b/abonapp/locale/ru/LC_MESSAGES/django.po
index d060efd..d12e11b 100644
--- a/abonapp/locale/ru/LC_MESSAGES/django.po
+++ b/abonapp/locale/ru/LC_MESSAGES/django.po
@@ -427,10 +427,6 @@ msgstr "Добавить муфту"
 msgid "Device port"
 msgstr "Порт устройства"
 
-#: templates/abonapp/editAbon.html:182
-msgid "Ports does not exist"
-msgstr "Порты не найдены"
-
 #: templates/abonapp/editAbon.html:190
 msgid "Is dynamic network settings"
 msgstr "Динамические настройки по dhcp"
@@ -992,3 +988,7 @@ msgstr "Звонки"
 msgid "No have ip"
 msgstr "Нет ip адреса"
 
+#: views.py:757
+#, python-format
+msgid "<a href='%(user_url)s'>%(user_name)s</a> already pinned to this port on this device"
+msgstr "<a href='%(user_url)s'>%(user_name)s</a> уже привязан к этому порту на этом устройстве"
diff --git a/abonapp/templates/abonapp/editAbon.html b/abonapp/templates/abonapp/editAbon.html
index c09f6fa..6a95b76 100644
--- a/abonapp/templates/abonapp/editAbon.html
+++ b/abonapp/templates/abonapp/editAbon.html
@@ -148,8 +148,6 @@
                                         {% else %}
                                             <option value="{{ port.pk }}">{{ port.num }}: {{ port.descr }}</option>
                                         {% endif %}
-                                    {% empty %}
-                                        <option value="0">{% trans 'Ports does not exist' %}</option>
                                     {% endfor %}
                                 </select>
                             </div>
diff --git a/abonapp/views.py b/abonapp/views.py
index d6be42b..5e8621c 100644
--- a/abonapp/views.py
+++ b/abonapp/views.py
@@ -9,7 +9,7 @@ from django.shortcuts import render, redirect, get_object_or_404, resolve_url
 from django.contrib.auth.decorators import login_required
 from django.http import HttpResponse
 from django.contrib import messages
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from statistics.models import StatCache
 from tariff_app.models import Tariff
@@ -745,11 +745,23 @@ def save_user_dev_port(request, gid, uid):
     user_port = mydefs.safe_int(request.POST.get('user_port'))
     is_dynamic_ip = request.POST.get('is_dynamic_ip')
     try:
+        abon = models.Abon.objects.get(pk=uid)
         if user_port == 0:
             port = None
         else:
             port = DevPort.objects.get(pk=user_port)
-        abon = models.Abon.objects.get(pk=uid)
+            if abon.device is not None:
+                try:
+                    other_abon = models.Abon.objects.get(device=abon.device, dev_port=port)
+                    user_url = resolve_url('abonapp:abon_home', other_abon.group.id, other_abon.id)
+                    messages.error(request, _("<a href='%(user_url)s'>%(user_name)s</a> already pinned to this port on this device") % {
+                        'user_url': user_url,
+                        'user_name': other_abon.get_full_name()
+                    })
+                    return redirect('abonapp:abon_home', gid, uid)
+                except models.Abon.DoesNotExist:
+                    pass
+
         abon.dev_port = port
         if abon.is_dynamic_ip != is_dynamic_ip:
             abon.is_dynamic_ip = is_dynamic_ip
diff --git a/clientsideapp/views.py b/clientsideapp/views.py
index 173e056..4d123e9 100644
--- a/clientsideapp/views.py
+++ b/clientsideapp/views.py
@@ -4,9 +4,9 @@ from django.contrib.gis.shortcuts import render_to_text
 from django.shortcuts import render, get_object_or_404, redirect
 from django.contrib import messages
 from django.db.transaction import atomic
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
-from abonapp.models import AbonLog, AbonTariff, InvoiceForPayment, Abon
+from abonapp.models import AbonLog, InvoiceForPayment, Abon
 from tariff_app.models import Tariff
 from mydefs import pag_mn, LogicError
 from agent import NasFailedResult, NasNetworkError
diff --git a/devapp/dev_types.py b/devapp/dev_types.py
index 6b2ea37..5db0309 100644
--- a/devapp/dev_types.py
+++ b/devapp/dev_types.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from mydefs import RuTimedelta, safe_int
 from datetime import timedelta
 from easysnmp import EasySNMPTimeoutError
diff --git a/devapp/models.py b/devapp/models.py
index 8412abb..f251af7 100644
--- a/devapp/models.py
+++ b/devapp/models.py
@@ -7,7 +7,7 @@ from mydefs import MyGenericIPAddressField, MyChoicesAdapter, ip2int
 from . import dev_types
 from subprocess import run
 from django.conf import settings
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from json.decoder import JSONDecodeError
 
 
diff --git a/devapp/views.py b/devapp/views.py
index 14381d6..201fbc2 100644
--- a/devapp/views.py
+++ b/devapp/views.py
@@ -7,7 +7,7 @@ from django.db.models import Q, Count
 from django.http import HttpResponse
 from django.shortcuts import render, redirect, get_object_or_404, resolve_url
 from django.contrib import messages
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from easysnmp import EasySNMPTimeoutError, EasySNMPError
 from json import dumps
 
diff --git a/dialing_app/models.py b/dialing_app/models.py
index 6846882..15575da 100644
--- a/dialing_app/models.py
+++ b/dialing_app/models.py
@@ -1,6 +1,6 @@
 from django.db import models
 from datetime import datetime
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.conf import settings
 
 
diff --git a/dialing_app/views.py b/dialing_app/views.py
index 401195e..700336f 100644
--- a/dialing_app/views.py
+++ b/dialing_app/views.py
@@ -4,7 +4,7 @@ from django.contrib.auth.decorators import login_required
 from django.contrib import messages
 from django.contrib.gis.shortcuts import render_to_text
 from django.shortcuts import render, redirect
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from guardian.decorators import permission_required_or_403 as permission_required
 from django.db.models import Q
 
diff --git a/djing/formfields.py b/djing/formfields.py
index bcd961f..3050e67 100644
--- a/djing/formfields.py
+++ b/djing/formfields.py
@@ -3,7 +3,7 @@ from django.forms.widgets import TextInput
 from django.core.validators import RegexValidator, _lazy_re_compile
 from django.forms.fields import EMPTY_VALUES
 from django.forms.utils import ValidationError
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from netaddr import EUI, AddrFormatError
 from . import MAC_ADDR_REGEX
 
diff --git a/mapapp/models.py b/mapapp/models.py
index 3a482bd..e18e3e5 100644
--- a/mapapp/models.py
+++ b/mapapp/models.py
@@ -1,5 +1,5 @@
 from django.db import models
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from devapp.models import Device
 
 
diff --git a/mapapp/views.py b/mapapp/views.py
index 26a38c9..8dc4861 100644
--- a/mapapp/views.py
+++ b/mapapp/views.py
@@ -4,7 +4,7 @@ from django.contrib.gis.shortcuts import render_to_text
 from django.core.exceptions import PermissionDenied
 from django.http import HttpResponse, HttpResponseRedirect, HttpResponseForbidden
 from django.shortcuts import render, redirect, get_object_or_404, resolve_url
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.db.models import Count
 from .models import Dot
 from .forms import DotForm
diff --git a/msg_app/forms.py b/msg_app/forms.py
index fd99831..2f14911 100644
--- a/msg_app/forms.py
+++ b/msg_app/forms.py
@@ -1,5 +1,5 @@
 from django import forms
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from .models import Conversation, Message, MessageError
 from accounts_app.models import UserProfile
 
diff --git a/msg_app/models.py b/msg_app/models.py
index d69c4e6..f8a1250 100644
--- a/msg_app/models.py
+++ b/msg_app/models.py
@@ -1,5 +1,5 @@
 from django.db import models
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from accounts_app.models import UserProfile
 from chatbot.telebot import send_notify
 from chatbot.models import ChatException
diff --git a/msg_app/views.py b/msg_app/views.py
index 2ffb87b..3d14e7f 100644
--- a/msg_app/views.py
+++ b/msg_app/views.py
@@ -3,7 +3,7 @@ from django.contrib.auth.decorators import login_required
 from django.contrib.gis.shortcuts import render_to_text
 from django.core.exceptions import PermissionDenied
 from django.http import HttpResponse
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.contrib import messages
 from django.shortcuts import render, redirect, get_object_or_404
 from chatbot.models import MessageQueue
diff --git a/templates/message_block.html b/templates/message_block.html
index 037077b..5688cc6 100644
--- a/templates/message_block.html
+++ b/templates/message_block.html
@@ -16,7 +16,7 @@
         {% endif %}
 
             <button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>
-            {{ message }}
+            {{ message|safe }}
         </div>
     {% endfor %}
 {% endif %}
\ No newline at end of file