diff --git a/backend/database/attachment.go b/backend/database/attachment.go
index 43a6d9d..20a0fc9 100644
--- a/backend/database/attachment.go
+++ b/backend/database/attachment.go
@@ -26,9 +26,7 @@ type Attachment struct {
 	Description     string `gorm:";"`
 	Filename        string `gorm:"not null;index"`
 	EmbeddedContent bool   `gorm:"not null;default:false;index"`
-	// SendAsCalendar sends an ics file as a text/calendar; method=REQUEST
-	// alternative part so Outlook and Exchange Online render it as a native
-	// calendar invitation instead of a plain attachment
+	// SendAsCalendar sends ics files as a calendar invitation
 	SendAsCalendar bool `gorm:"not null;default:false;index"`
 }
 
diff --git a/backend/seed/migrate.go b/backend/seed/migrate.go
index 6d6d5fe..d7d765d 100644
--- a/backend/seed/migrate.go
+++ b/backend/seed/migrate.go
@@ -468,21 +468,6 @@ func migrate(db *gorm.DB) error {
 		return errs.Wrap(err)
 	}
 
-	// migration for attachments.send_as_calendar
-	// first add column as nullable
-	if err := db.Exec(`ALTER TABLE attachments ADD COLUMN send_as_calendar BOOLEAN`).Error; err != nil {
-		// column might already exist, ignore error
-		errMsg := strings.ToLower(err.Error())
-		if !strings.Contains(errMsg, "duplicate") && !strings.Contains(errMsg, "already exists") {
-			return errs.Wrap(err)
-		}
-	}
-
-	// update existing rows
-	if err := db.Exec(`UPDATE attachments SET send_as_calendar = false WHERE send_as_calendar IS NULL`).Error; err != nil {
-		return errs.Wrap(err)
-	}
-
 	// migration for email_attachments.is_inline
 	// first add column as nullable
 	if err := db.Exec(`ALTER TABLE email_attachments ADD COLUMN is_inline BOOLEAN`).Error; err != nil {