diff --git a/src/Bundle/ChillCalendarBundle/migrations/Version20220527234046.php b/src/Bundle/ChillCalendarBundle/migrations/Version20220527234046.php
new file mode 100644
index 000000000..c53f82661
--- /dev/null
+++ b/src/Bundle/ChillCalendarBundle/migrations/Version20220527234046.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Chill\Migrations\Calendar;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20220527234046 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('UPDATE chill_calendar.calendar SET privateComment_comments=\'{}\' WHERE privateComment_comments IS NULL');
+        $this->addSql('ALTER TABLE chill_calendar.calendar ALTER COLUMN privateComment_comments SET NOT NULL');
+        $this->addSql('ALTER TABLE chill_calendar.calendar ALTER COLUMN privateComment_comments SET DEFAULT \'{}\'');
+
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE chill_calendar.calendar ALTER COLUMN privateComment_comments DROP NOT NULL');
+        $this->addSql('ALTER TABLE chill_calendar.calendar ALTER COLUMN privateComment_comments SET DEFAULT NULL');
+    }
+}