bumped the version number;updated database schema;

lib/Migration/Version00001date20210807.php

@@ -79,7 +79,7 @@ class Version00001date20210807 extends SimpleMigrationStep
                 'notnull' => false,
                 'default' => null,
             ]);
-            $table->setPrimaryKey(['id','gid']);
+            $table->setPrimaryKey(['id']);
         }
         return $schema;
     }

lib/Migration/Version00002date20210912.php

@@ -0,0 +1,81 @@
+<?php
+
+declare (strict_types = 1);
+/**
+ * @copyright Copyright (c) 2020 Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\NCDownloader\Migration;
+
+use Closure;
+use OCP\DB\ISchemaWrapper;
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+class Version00002date20210912 extends SimpleMigrationStep
+{
+
+    /** @var IDBConnection */
+    protected $connection;
+
+    public function __construct(IDBConnection $connection)
+    {
+        $this->connection = $connection;
+    }
+
+    /**
+     * @param IOutput $output
+     * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+     * @param array $options
+     * @return null|ISchemaWrapper
+     */
+    public function changeSchema(IOutput $output, Closure $schemaClosure, array $options)
+    {
+        /** @var ISchemaWrapper $schema */
+        $schema = $schemaClosure();
+
+        $table = $schema->getTable('ncdownloader_info');
+        if (!$table->hasColumn('speed')) {
+            $table->addColumn('speed', 'string', [
+                'notnull' => true,
+                'length' => 255,
+                'default' => 'unknown',
+            ]);
+        }
+        if (!$table->hasColumn('progress')) {
+            $table->addColumn('progress', 'string', [
+                'notnull' => true,
+                'length' => 255,
+                'default' => '0',
+            ]);
+        }
+        if (!$table->hasColumn('filesize')) {
+            $table->addColumn('filesize', 'string', [
+                'notnull' => false,
+                'length' => 255,
+                'default' => '',
+            ]);
+        }
+        $table->addUniqueIndex(['gid'], 'gid_index');
+        return $schema;
+    }
+
+}