@@ -, +, @@ 
 return
---
 Koha/REST/V1/Bookings.pm                | 2 ++
 api/v1/swagger/definitions/booking.yaml | 2 ++
 2 files changed, 4 insertions(+)
--- a/Koha/REST/V1/Bookings.pm	
+++ a/Koha/REST/V1/Bookings.pm	
@@ -77,6 +77,7 @@ sub add {
     return try {
         my $booking = Koha::Booking->new_from_api( $c->req->json );
         $booking->store;
+        $booking->discard_changes;
         $c->res->headers->location( $c->req->url->to_string . '/' . $booking->booking_id );
         return $c->render(
             status  => 201,
@@ -118,6 +119,7 @@ sub update {
     return try {
         $booking->set_from_api( $c->req->json );
         $booking->store();
+        $booking->discard_changes;
         return $c->render( status => 200, openapi => $c->objects->to_api($booking) );
     } catch {
         $c->unhandled_exception($_);
--- a/api/v1/swagger/definitions/booking.yaml	
+++ a/api/v1/swagger/definitions/booking.yaml	
@@ -12,6 +12,7 @@ properties:
     type: integer
   creation_date:
     description: Creation date and time of this booking
+    readOnly: true
     format: date-time
     type: string
   end_date:
@@ -30,6 +31,7 @@ properties:
       - 'null'
   modification_date:
     description: Modification date and time of this booking
+    readOnly: true
     format: date-time
     type: string
   patron_id:
--