diff --git a/packages/db/migrations/0028_sms_reminders.sql b/packages/db/migrations/0028_sms_reminders.sql
index 4c63eb2..1e7314b 100644
--- a/packages/db/migrations/0028_sms_reminders.sql
+++ b/packages/db/migrations/0028_sms_reminders.sql
@@ -1,12 +1,15 @@
--- SMS opt-in fields for clients
-ALTER TABLE "clients" ADD COLUMN "sms_opt_in" boolean NOT NULL DEFAULT false;
-ALTER TABLE "clients" ADD COLUMN "sms_consent_date" timestamp;
-ALTER TABLE "clients" ADD COLUMN "sms_opt_out_date" timestamp;
-ALTER TABLE "clients" ADD COLUMN "sms_consent_text" text;
+-- SMS opt-in fields for clients (idempotent)
+ALTER TABLE "clients" ADD COLUMN IF NOT EXISTS "sms_opt_in" boolean NOT NULL DEFAULT false;
+ALTER TABLE "clients" ADD COLUMN IF NOT EXISTS "sms_consent_date" timestamp;
+ALTER TABLE "clients" ADD COLUMN IF NOT EXISTS "sms_opt_out_date" timestamp;
+ALTER TABLE "clients" ADD COLUMN IF NOT EXISTS "sms_consent_text" text;
 
--- Add channel column to reminder_logs with default 'email'
-ALTER TABLE "reminder_logs" ADD COLUMN "channel" text NOT NULL DEFAULT 'email';
+-- Add channel column to reminder_logs with default 'email' (idempotent)
+ALTER TABLE "reminder_logs" ADD COLUMN IF NOT EXISTS "channel" text NOT NULL DEFAULT 'email';
 
--- Drop the old unique constraint and recreate with channel
-ALTER TABLE "reminder_logs" DROP CONSTRAINT "reminder_logs_appointment_id_reminder_type_unique";
+-- Drop old unique constraints if they exist (idempotent)
+ALTER TABLE "reminder_logs" DROP CONSTRAINT IF EXISTS "reminder_logs_appointment_id_reminder_type_key";
+ALTER TABLE "reminder_logs" DROP CONSTRAINT IF EXISTS "reminder_logs_appointment_id_reminder_type_unique";
+
+-- Add new unique constraint with channel
 ALTER TABLE "reminder_logs" ADD CONSTRAINT "reminder_logs_appointment_id_reminder_type_channel_unique" UNIQUE ("appointment_id", "reminder_type", "channel");