diff --git a/migrations/Version20231001214111.php b/migrations/Version20231001214111.php
index c6114d3..a60925a 100644
--- a/migrations/Version20231001214111.php
+++ b/migrations/Version20231001214111.php
@@ -21,9 +21,9 @@ public function up(Schema $schema): void
     {
         $this->skipIf('mysql' !== $this->connection->getDatabasePlatform()->getName(), 'This migration is specific to \'mysql\'. Skipping it is fine.');
 
-        $this->addSql('ALTER TABLE calendarobjects CHANGE calendardata calendardata TEXT DEFAULT NULL');
-        $this->addSql('ALTER TABLE cards CHANGE carddata carddata TEXT DEFAULT NULL');
-        $this->addSql('ALTER TABLE schedulingobjects CHANGE calendardata calendardata TEXT DEFAULT NULL');
+        $this->addSql('ALTER TABLE calendarobjects CHANGE calendardata calendardata MEDIUMTEXT DEFAULT NULL');
+        $this->addSql('ALTER TABLE cards CHANGE carddata carddata MEDIUMTEXT DEFAULT NULL');
+        $this->addSql('ALTER TABLE schedulingobjects CHANGE calendardata calendardata MEDIUMTEXT DEFAULT NULL');
     }
 
     public function down(Schema $schema): void
diff --git a/migrations/Version20231229203515.php b/migrations/Version20231229203515.php
index 8e2675c..8e1a653 100644
--- a/migrations/Version20231229203515.php
+++ b/migrations/Version20231229203515.php
@@ -9,6 +9,8 @@
 
 /**
  * Scale up to MEDIUMTEXT for calendar and card data https://github.com/tchapi/davis/pull/111#issuecomment-1872295498
+ * ⚠️ This does not fail if the column is already a MEDIUM TEXT, which has allowed us to change a previous migration
+ * without touching this one (see https://github.com/tchapi/davis/issues/128)
  */
 final class Version20231229203515 extends AbstractMigration
 {