fixes #4141

Closes #4141

Merge request studip/studip!2983

db/migrations/6.0.4_adjust_cache_types_table.php

+<?php
+return new class extends Migration
+{
+    private const MAPPING = [
+        StudipDbCache::class        => Studip\Cache\DbCache::class,
+        StudipFileCache::class      => Studip\Cache\FileCache::class,
+        StudipMemcachedCache::class => Studip\Cache\MemcachedCache::class,
+        StudipRedisCache::class     => Studip\Cache\RedisCache::class,
+    ];
+
+    public function description()
+    {
+        return 'Replaces the renamed cache classes in table "cache_types"';
+    }
+
+    protected function up()
+    {
+        foreach (self::MAPPING as $old => $new) {
+            self::updateCacheTypesTable($old, $new);
+        }
+    }
+
+    protected function down()
+    {
+        foreach (self::MAPPING as $old => $new) {
+            self::updateCacheTypesTable($new, $old);
+        }
+    }
+
+    private function updateCacheTypesTable(string $old, string $new): void
+    {
+        $query = "UPDATE `cache_types`
+                  SET `class_name` = ?
+                  WHERE `class_name` = ?";
+        DBManager::get()->execute($query, [$new, $old]);
+    }
+};