Merge branch 'main' into issue-3911issue-3911

1 files changed, 11 insertions, 12 deletions

diff --git a/lib/classes/PluginAdministration.php b/lib/classes/PluginAdministration.php
index 2732f58..faba3ec 100644
--- a/lib/classes/PluginAdministration.php
+++ b/lib/classes/PluginAdministration.php
@@ -440,27 +440,26 @@ class PluginAdministration
         // get plugin meta data
         $pluginclass = $manifest['pluginclassname'];
         $origin      = $manifest['origin'];
-        $min_version = $manifest['studipMinVersion'];
-        $max_version = $manifest['studipMaxVersion'];
+        $min_version = $manifest['studipMinVersion'] ?? null;
+        $max_version = $manifest['studipMaxVersion'] ?? null;
 
         // check for compatible version
-        if ((isset($min_version) && StudipVersion::olderThan($min_version)) ||
-            (isset($max_version) && StudipVersion::newerThan($max_version))) {
+        if (
+            (isset($min_version) && StudipVersion::olderThan($min_version))
+            || (isset($max_version) && StudipVersion::newerThan($max_version))
+        ) {
             throw new PluginInstallationException(_('Das Plugin ist mit dieser Stud.IP-Version nicht kompatibel.'));
         }
 
         // determine the plugin path
-        $basepath = Config::get()->PLUGINS_PATH;
         $pluginpath = $origin . '/' . $pluginclass;
 
-        $pluginregistered = $plugin_manager->getPluginInfo($pluginclass);
-
-        if ($pluginregistered) {
-            new PluginInstallationException(_('Das Plugin ist bereits registriert.'));
-        }
-
         // create database schema if needed
-        $this->createDBSchema($plugindir, $manifest, $pluginregistered);
+        $this->createDBSchema(
+            $plugindir,
+            $manifest,
+            (bool) $plugin_manager->getPluginInfo($pluginclass)
+        );
 
         // now register the plugin in the database
         $pluginid = $plugin_manager->registerPlugin($manifest['pluginname'], $pluginclass, $pluginpath);