diff --git a/src/GmRelay.Bot/Features/Confirmation/SendConfirmation/SendConfirmationHandler.cs b/src/GmRelay.Bot/Features/Confirmation/SendConfirmation/SendConfirmationHandler.cs
index f69011a..1a4f404 100644
--- a/src/GmRelay.Bot/Features/Confirmation/SendConfirmation/SendConfirmationHandler.cs
+++ b/src/GmRelay.Bot/Features/Confirmation/SendConfirmation/SendConfirmationHandler.cs
@@ -112,6 +112,7 @@ public sealed class SendConfirmationHandler(
                 confirmation_sent_at = now(),
                 updated_at = now()
             WHERE id = @SessionId
+              AND confirmation_sent_at IS NULL
             """,
             new
             {
diff --git a/src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleTimeInputHandler.cs b/src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleTimeInputHandler.cs
index e66efb0..e255761 100644
--- a/src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleTimeInputHandler.cs
+++ b/src/GmRelay.Bot/Features/Sessions/RescheduleSession/HandleRescheduleTimeInputHandler.cs
@@ -224,6 +224,8 @@ public sealed class HandleRescheduleTimeInputHandler(
             UPDATE sessions
             SET scheduled_at = @NewTime,
                 status = @Status,
+                confirmation_message_id = NULL,
+                confirmation_sent_at = NULL,
                 one_hour_reminder_processed_at = NULL,
                 updated_at = now()
             WHERE id = @SessionId
diff --git a/src/GmRelay.Bot/Features/Sessions/RescheduleSession/RescheduleVotingDeadlineService.cs b/src/GmRelay.Bot/Features/Sessions/RescheduleSession/RescheduleVotingDeadlineService.cs
index 046b126..3c856cd 100644
--- a/src/GmRelay.Bot/Features/Sessions/RescheduleSession/RescheduleVotingDeadlineService.cs
+++ b/src/GmRelay.Bot/Features/Sessions/RescheduleSession/RescheduleVotingDeadlineService.cs
@@ -169,6 +169,7 @@ public sealed class RescheduleVotingDeadlineService(
                 SET scheduled_at = @NewTime,
                     status = @Status,
                     confirmation_message_id = NULL,
+                    confirmation_sent_at = NULL,
                     link_message_id = NULL,
                     one_hour_reminder_processed_at = NULL,
                     updated_at = now()