diff --git a/app/controllers/admin/plugin.php b/app/controllers/admin/plugin.php
index 0d17ff4d6479c5d666266b62aa7f8b3a8ad7cfe9..91f597245f7b812a114c7884f3c2e63c55685184 100644
--- a/app/controllers/admin/plugin.php
+++ b/app/controllers/admin/plugin.php
@@ -490,52 +490,6 @@ class Admin_PluginController extends AuthenticatedController
         $this->manifest = $manifest;
     }
 
-    /**
-     * Display the default activation set for this plugin.
-     */
-    public function default_activation_action($plugin_id)
-    {
-        Helpbar::Get()->addPlainText(_('Einrichtungen'), _('Wählen Sie die Einrichtungen, in deren Veranstaltungen das Plugin automatisch aktiviert sein soll.'), Icon::create('info'));
-        $actions = new ActionsWidget();
-        $actions->addLink(_('Pluginverwaltung'), $this->url_for('admin/plugin'), Icon::create('plugin', 'clickable'));
-        Sidebar::Get()->addWidget($actions);
-        $plugin_manager = PluginManager::getInstance();
-        $plugin = $plugin_manager->getPluginInfoById($plugin_id);
-        $selected_inst = $plugin_manager->getDefaultActivations($plugin_id);
-
-        $this->plugin_name   = $plugin['name'];
-        $this->plugin_id     = $plugin_id;
-        $this->selected_inst = $selected_inst;
-        $this->institutes    = $this->plugin_admin->getInstitutes();
-    }
-
-    /**
-     * Change the default activation for this plugin.
-     */
-    public function save_default_activation_action($plugin_id)
-    {
-        $plugin_manager = PluginManager::getInstance();
-        $selected_inst = Request::optionArray('selected_inst');
-
-        $this->check_ticket();
-
-        // save selected institutes (if any)
-        $plugin_manager->setDefaultActivations($plugin_id, $selected_inst);
-
-        if (count($selected_inst) === 0) {
-            PageLayout::postSuccess(_('Die Default-Aktivierung wurde ausgeschaltet.'));
-        } else {
-            $message = ngettext(
-                'Für die ausgewählte Einrichtung wurde das Plugin standardmäßig aktiviert.',
-                'Für die ausgewählten Einrichtungen wurde das Plugin standardmäßig aktiviert.',
-                count($selected_inst)
-            );
-            PageLayout::postSuccess($message);
-        }
-
-        $this->redirect('admin/plugin/default_activation/' . $plugin_id);
-    }
-
     /**
      * migrate a plugin to top version
      *
diff --git a/app/views/admin/plugin/default_activation.php b/app/views/admin/plugin/default_activation.php
deleted file mode 100644
index 5ac8d16653374318b4b6f186d35869108f056919..0000000000000000000000000000000000000000
--- a/app/views/admin/plugin/default_activation.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?
-# Lifter010: TODO
-use Studip\Button, Studip\LinkButton;
-
-?>
-<? if (isset($flash['message'])): ?>
-    <?= MessageBox::success($flash['message']) ?>
-<? endif ?>
-
-<form action="<?= $controller->url_for('admin/plugin/save_default_activation', $plugin_id) ?>" method="post" class="default">
-    <?= CSRFProtection::tokenTag() ?>
-    <input type="hidden" name="studip_ticket" value="<?= get_ticket() ?>">
-
-    <fieldset>
-        <legend>
-            <?= _('Standard-Aktivierung in Veranstaltungen') ?>: <?= htmlReady($plugin_name) ?>
-        </legend>
-
-
-        <label>
-            <?= _('Einrichtung') ?>
-            <select name="selected_inst[]" multiple size="20" class="nested-select" style="width: 100%">
-                <? foreach ($institutes as $id => $institute): ?>
-                    <option class="nested-item-header" value="<?= $id ?>" <?= in_array($id, $selected_inst) ? 'selected' : '' ?>>
-                        <?= htmlReady($institute['name']) ?>
-                    </option>
-
-                    <? if (isset($institute['children'])): ?>
-                        <? foreach ($institute['children'] as $id => $child): ?>
-                            <option class="nested-item" value="<?= $id ?>" <?= in_array($id, $selected_inst) ? 'selected' : '' ?>>
-                                <?= htmlReady($child['name']) ?>
-                            </option>
-                        <? endforeach ?>
-                    <? endif ?>
-                <? endforeach ?>
-            </select>
-        </label>
-    </fieldset>
-
-    <footer>
-        <?= Button::create(_('Übernehmen'),'save', ['title' => _('Einstellungen speichern')])?>
-        &nbsp;
-        <?= LinkButton::create('<< ' . _("Zurück"), $controller->url_for('admin/plugin'), ['title' => _('Zurück zur Plugin-Verwaltung')])?>
-    </footer>
-</form>
diff --git a/app/views/admin/plugin/index.php b/app/views/admin/plugin/index.php
index 7187a772f81d0954e8c9319cea19ef40cfab3161..3266c778ac8f4e40dd493534fd10c00d58bb6bb5 100644
--- a/app/views/admin/plugin/index.php
+++ b/app/views/admin/plugin/index.php
@@ -90,13 +90,6 @@ use Studip\Button, Studip\LinkButton;
                         </td>
                         <td class="actions">
                             <? $actionMenu = ActionMenu::get() ?>
-                            <? if (in_array('StandardPlugin', $plugin['type'])): ?>
-                                <? $actionMenu->addLink(
-                                    $controller->url_for('admin/plugin/default_activation/' . $pluginid),
-                                    _('In Veranstaltungen aktivieren'),
-                                    Icon::create('seminar+add', 'clickable', ['title' => _('In Veranstaltungen aktivieren')])
-                                ) ?>
-                            <? endif ?>
                             <? $actionMenu->addLink(
                                 $controller->url_for('admin/role/assign_plugin_role/' . $pluginid),
                                 _('Zugriffsrechte bearbeiten'),
@@ -114,8 +107,6 @@ use Studip\Button, Studip\LinkButton;
                                     ]),
                                     ['data-dialog' => 'size=auto;reload-on-close']
                                 ) ?>
-                            <? endif ?>
-                            <? if (!$plugin['depends'] && isset($update_info[$pluginid]['version']) && !$plugin['core']): ?>
                                 <? $actionMenu->addLink(
                                     $controller->url_for('admin/plugin/download/' . $pluginid),
                                     _('Herunterladen'),
diff --git a/db/migrations/5.1.28_drop_default_activations.php b/db/migrations/5.1.28_drop_default_activations.php
new file mode 100644
index 0000000000000000000000000000000000000000..bc5b75897b7eebe3b037a8ccd358e700be34dffb
--- /dev/null
+++ b/db/migrations/5.1.28_drop_default_activations.php
@@ -0,0 +1,29 @@
+<?php
+
+class DropDefaultActivations extends Migration
+{
+    public function description()
+    {
+        return 'Drop unused plugin default activations';
+    }
+
+    public function up()
+    {
+        $db = DBManager::get();
+
+        $db->exec('DROP TABLE IF EXISTS plugins_default_activations');
+    }
+
+    public function down()
+    {
+        $db = DBManager::get();
+
+        $db->exec("
+            CREATE TABLE plugins_default_activations (
+              pluginid int(10) unsigned NOT NULL DEFAULT 0,
+              institutid char(32) COLLATE latin1_bin NOT NULL DEFAULT '',
+              PRIMARY KEY (pluginid, institutid)
+            )
+        ");
+    }
+}
diff --git a/lib/classes/PluginAdministration.php b/lib/classes/PluginAdministration.php
index 123a0f25457753e91e8703796c01f791af66965f..caf80ceab22fbe170438f59ea3f5ffe750601fd5 100644
--- a/lib/classes/PluginAdministration.php
+++ b/lib/classes/PluginAdministration.php
@@ -291,32 +291,6 @@ class PluginAdministration
         }
     }
 
-    /**
-     * Get a list of all available institutes.
-     */
-    public function getInstitutes()
-    {
-        $db = DBManager::get();
-        $institutes = [];
-
-        $sql = 'SELECT Institut_id, Name, fakultaets_id, Institut_id = fakultaets_id AS is_fak
-                FROM Institute ORDER BY is_fak DESC, Name';
-        $result = $db->query($sql)->fetchAll();
-
-        foreach ($result as $row) {
-            $inst_id = $row['Institut_id'];
-            $fak_id = $row['fakultaets_id'];
-
-            if ($inst_id == $fak_id) {
-                $institutes[$inst_id] = ['name' => $row['Name']];
-            } else {
-                $institutes[$fak_id]['children'][$inst_id] = ['name' => $row['Name']];
-            }
-        }
-
-        return $institutes;
-    }
-
     /**
      * Get a list of the types of all installed plugins.
      *
diff --git a/lib/plugins/engine/PluginManager.class.php b/lib/plugins/engine/PluginManager.class.php
index 9216754632f6a66046b25f814f50c186f7be78ea..1745e506ab5d79b5a762582843832541369d66fa 100644
--- a/lib/plugins/engine/PluginManager.class.php
+++ b/lib/plugins/engine/PluginManager.class.php
@@ -299,43 +299,6 @@ class PluginManager
         return $statement->rowCount();
     }
 
-    /**
-     * Returns the list of institutes for which a specific plugin is
-     * enabled by default.
-     *
-     * @param int $id id of the plugin
-     */
-    public function getDefaultActivations ($id)
-    {
-        $db = DBManager::get();
-
-        $result = $db->query("SELECT institutid FROM plugins_default_activations
-                              WHERE pluginid = '$id'");
-
-        return $result->fetchAll(PDO::FETCH_COLUMN);
-    }
-
-    /**
-     * Set the list of institutes for which a specific plugin should
-     * be enabled by default.
-     *
-     * @param int   $id          id of the plugin
-     * @param array $institutes  array of institute ids
-     */
-    public function setDefaultActivations ($id, $institutes)
-    {
-        $db = DBManager::get();
-
-        $result = $db->query("DELETE FROM plugins_default_activations
-                              WHERE pluginid = '$id'");
-
-        $stmt = $db->prepare("INSERT INTO plugins_default_activations
-                              (pluginid, institutid) VALUES (?,?)");
-        foreach ($institutes as $instid) {
-            $stmt->execute([$id, $instid]);
-        }
-    }
-
     /**
      * Disable loading of all non-core plugins for the current session.
      *
@@ -496,7 +459,6 @@ class PluginManager
 
             $db->execute("DELETE FROM plugins WHERE pluginid = ?", [$id]);
             $db->execute("DELETE FROM plugins_activated WHERE pluginid = ?", [$id]);
-            $db->execute("DELETE FROM plugins_default_activations WHERE pluginid = ?", [$id]);
             $db->execute("DELETE FROM roles_plugins WHERE pluginid = ?", [$id]);
 
             unset($this->plugins[$id]);