diff --git a/src/ui/conf/appgroup.cpp b/src/ui/conf/appgroup.cpp
index 0e5cc538..87d7c2a0 100644
--- a/src/ui/conf/appgroup.cpp
+++ b/src/ui/conf/appgroup.cpp
@@ -144,32 +144,6 @@ QString AppGroup::menuLabel() const
     return text;
 }
 
-void AppGroup::clear()
-{
-    m_edited = true;
-    m_enabled = true;
-
-    m_logConn = true;
-    m_fragmentPacket = false;
-    m_periodEnabled = false;
-
-    m_limitInEnabled = false;
-    m_limitOutEnabled = false;
-
-    m_speedLimitIn = 0;
-    m_speedLimitOut = 0;
-
-    // m_id should pe preserved
-
-    m_name = QString();
-
-    m_blockText = QString();
-    m_allowText = QString();
-
-    m_periodFrom = QString();
-    m_periodTo = QString();
-}
-
 void AppGroup::copy(const AppGroup &o)
 {
     m_edited = o.edited();
diff --git a/src/ui/conf/appgroup.h b/src/ui/conf/appgroup.h
index 586e0795..54acc355 100644
--- a/src/ui/conf/appgroup.h
+++ b/src/ui/conf/appgroup.h
@@ -63,7 +63,6 @@ public:
 
     QString menuLabel() const;
 
-    void clear();
     void copy(const AppGroup &o);
 
     QVariant toVariant() const;
diff --git a/src/ui/conf/confmanager.cpp b/src/ui/conf/confmanager.cpp
index f47ce2a8..a0a4d67c 100644
--- a/src/ui/conf/confmanager.cpp
+++ b/src/ui/conf/confmanager.cpp
@@ -1025,20 +1025,20 @@ bool ConfManager::removeAppGroupsInDb(const FirewallConf &conf)
     Q_ASSERT(!conf.appGroups().isEmpty());
     const auto defaultAppGroupId = conf.appGroups().at(0)->id();
 
-    for (AppGroup *appGroup : conf.removedAppGroupsList()) {
+    for (const qint64 appGroupId : conf.removedAppGroupIdList()) {
         bool ok;
 
-        sqliteDb()->executeEx(sqlUpdateAppResetGroup,
-                QVariantList() << appGroup->id() << defaultAppGroupId, 0, &ok);
+        sqliteDb()->executeEx(
+                sqlUpdateAppResetGroup, QVariantList() << appGroupId << defaultAppGroupId, 0, &ok);
         if (!ok)
             return false;
 
-        sqliteDb()->executeEx(sqlDeleteAppGroup, QVariantList() << appGroup->id(), 0, &ok);
+        sqliteDb()->executeEx(sqlDeleteAppGroup, QVariantList() << appGroupId, 0, &ok);
         if (!ok)
             return false;
     }
 
-    conf.clearRemovedAppGroups();
+    conf.clearRemovedAppGroupIdList();
 
     return true;
 }
diff --git a/src/ui/conf/firewallconf.cpp b/src/ui/conf/firewallconf.cpp
index 4d9222c5..e37fe566 100644
--- a/src/ui/conf/firewallconf.cpp
+++ b/src/ui/conf/firewallconf.cpp
@@ -152,7 +152,8 @@ void FirewallConf::addAppGroup(AppGroup *appGroup, int to)
 
 AppGroup *FirewallConf::addAppGroupByName(const QString &name)
 {
-    auto appGroup = !m_removedAppGroups.isEmpty() ? m_removedAppGroups.takeLast() : new AppGroup();
+    auto appGroup = new AppGroup();
+    appGroup->setId(m_removedAppGroupIdList.isEmpty() ? 0 : m_removedAppGroupIdList.takeLast());
     appGroup->setName(name);
     addAppGroup(appGroup);
     return appGroup;
@@ -176,12 +177,10 @@ void FirewallConf::removeAppGroup(int from, int to)
     const int hi = qMax(from, to);
     for (int i = hi; i >= lo; --i) {
         AppGroup *appGroup = m_appGroups.at(i);
-        if (appGroup->id() == 0) {
-            appGroup->deleteLater();
-        } else {
-            appGroup->clear();
-            m_removedAppGroups.append(appGroup);
+        if (appGroup->id() > 0) {
+            m_removedAppGroupIdList.append(appGroup->id());
         }
+        appGroup->deleteLater();
 
         m_appGroups.removeAt(i);
     }
@@ -195,10 +194,9 @@ void FirewallConf::addDefaultAppGroup()
     appGroup->setAllowText(FileUtil::appBinLocation() + "/**");
 }
 
-void FirewallConf::clearRemovedAppGroups() const
+void FirewallConf::clearRemovedAppGroupIdList() const
 {
-    qDeleteAll(m_removedAppGroups);
-    m_removedAppGroups.clear();
+    m_removedAppGroupIdList.clear();
 }
 
 void FirewallConf::loadAppGroupBits()
@@ -387,6 +385,23 @@ void FirewallConf::appGroupsFromVariant(const QVariant &v)
     }
 }
 
+QVariant FirewallConf::removedAppGroupIdListToVariant() const
+{
+    QVariantList list;
+    for (const qint64 id : removedAppGroupIdList()) {
+        list.append(id);
+    }
+    return list;
+}
+
+void FirewallConf::removedAppGroupIdListFromVariant(const QVariant &v)
+{
+    const QVariantList list = v.toList();
+    for (const QVariant &v : list) {
+        m_removedAppGroupIdList.append(v.toLongLong());
+    }
+}
+
 QVariant FirewallConf::toVariant(bool onlyFlags) const
 {
     QVariantMap map;
@@ -398,6 +413,7 @@ QVariant FirewallConf::toVariant(bool onlyFlags) const
     if (!onlyFlags || optEdited()) {
         map["addressGroups"] = addressesToVariant();
         map["appGroups"] = appGroupsToVariant();
+        map["removedAppGroupIdList"] = removedAppGroupIdListToVariant();
     }
 
     if (!onlyFlags || flagsEdited()) {
@@ -424,6 +440,7 @@ void FirewallConf::fromVariant(const QVariant &v, bool onlyFlags)
     if (optEdited()) {
         addressesFromVariant(map["addressGroups"]);
         appGroupsFromVariant(map["appGroups"]);
+        removedAppGroupIdListFromVariant(map["removedAppGroupIdList"]);
     }
 
     if (flagsEdited()) {
diff --git a/src/ui/conf/firewallconf.h b/src/ui/conf/firewallconf.h
index 3500cd5a..215e3a60 100644
--- a/src/ui/conf/firewallconf.h
+++ b/src/ui/conf/firewallconf.h
@@ -99,8 +99,8 @@ public:
 
     const QList<AppGroup *> &appGroups() const { return m_appGroups; }
 
-    const QList<AppGroup *> &removedAppGroupsList() const { return m_removedAppGroups; }
-    void clearRemovedAppGroups() const;
+    const QVector<qint64> &removedAppGroupIdList() const { return m_removedAppGroupIdList; }
+    void clearRemovedAppGroupIdList() const;
 
     IniOptions &ini() { return m_iniOptions; }
     const IniOptions &ini() const { return m_iniOptions; }
@@ -142,6 +142,9 @@ private:
     QVariant appGroupsToVariant() const;
     void appGroupsFromVariant(const QVariant &v);
 
+    QVariant removedAppGroupIdListToVariant() const;
+    void removedAppGroupIdListFromVariant(const QVariant &v);
+
 private:
     uint m_editedFlags : 4;
 
@@ -171,7 +174,7 @@ private:
 
     QList<AddressGroup *> m_addressGroups;
     QList<AppGroup *> m_appGroups;
-    mutable QList<AppGroup *> m_removedAppGroups;
+    mutable QVector<qint64> m_removedAppGroupIdList;
 
     IniOptions m_iniOptions;
 };