started version numbering at 1.0

migrations/04_migrate_plugin_name.php

@@ -7,11 +7,10 @@ class MigratePluginName extends Migration
     {
         $db = DBManager::get();
 
-        $owncloud_plugin_existed = $db->exec(
-            "UPDATE `plugins` SET `pluginname` = 'NextcloudPlugin'
-            WHERE `pluginname` = 'OwnCloudPlugin'"
+        $owncloud_plugin_exists = $db->query(
+            "SELECT '1' FROM `plugins` WHERE `pluginname` = 'OwnCloudPlugin'"
         );
-        if ($owncloud_plugin_existed) {
+        if ($owncloud_plugin_exists->fetchColumn()) {
             //Migrate the configuration from the OwnCloudPlugin:
             $this->migrateConfigFromOwncloudPlugin();
         }

plugin.manifest

 pluginname=NextcloudPlugin
 pluginclassname=NextcloudPlugin
-version=3.0
+version=1.0
 origin=data-quest
 studipMinVersion=5.0
 studipMaxVersion=5.3.99