fix: sync tags relation table on import

composer.json

@@ -4,7 +4,7 @@
   "type": "contao-bundle",
   "license": "proprietary",
   "require": {
-    "php": "^8.4",
+    "php": "^8.3",
     "contao/core-bundle": "^5.7",
     "contao/calendar-bundle": "^5.7",
     "contao/manager-plugin": "^2.0",

src/Command/ImportEventsCommand.php

@@ -27,7 +27,7 @@ class ImportEventsCommand extends Command
     private const int TARGET_CALENDAR_ID = 1;
     private const int TARGET_ORGANIZATION_ID = 142;
     private const int TARGET_AUTHOR_ID = 8;
-    private const array DEFAULT_TAGS = [7, 8];
+    private const array DEFAULT_TAGS = [23];
 
     public function __construct(
         private readonly ContaoFramework $framework,
@@ -212,6 +212,7 @@ class ImportEventsCommand extends Command
         }
 
         $this->syncOrganization($eventId);
+        $this->syncTags($eventId, self::DEFAULT_TAGS);
     }
 
     private function findEventIdByExternalId(string $externalId): int|null
@@ -240,6 +241,33 @@ class ImportEventsCommand extends Command
         ]);
     }
 
+    /**
+     * @param int[] $tagIds
+     */
+    private function syncTags(int $eventId, array $tagIds): void
+    {
+        $normalizedTagIds = array_values(array_unique(array_map('intval', $tagIds)));
+
+        $this->connection->delete('tl_tags_rel', [
+            'pid' => $eventId,
+            'ptable' => 'tl_calendar_events',
+            'field' => 'tags',
+        ]);
+
+        foreach ($normalizedTagIds as $tagId) {
+            if ($tagId <= 0) {
+                continue;
+            }
+
+            $this->connection->insert('tl_tags_rel', [
+                'tag_id' => $tagId,
+                'pid' => $eventId,
+                'ptable' => 'tl_calendar_events',
+                'field' => 'tags',
+            ]);
+        }
+    }
+
     private function generateAlias(string $title, int $startDate, string $preferredAlias, int|null $eventId): string
     {
         $candidate = $preferredAlias !== '' ? $this->normalizeAlias($preferredAlias) : '';