fix: disable guest is not updating onchange (#20340)

packages/trpc/server/routers/viewer/eventTypes/update.handler.ts

@@ -161,6 +161,7 @@ export const updateHandler = async ({ ctx, input }: UpdateOptions) => {
   }
 
   const teamId = input.teamId || eventType.team?.id;
+  const guestsField = bookingFields?.find((field) => field.name === "guests");
 
   ensureUniqueBookingFields(bookingFields);
   ensureEmailOrPhoneNumberIsPresent(bookingFields);
@@ -183,6 +184,7 @@ export const updateHandler = async ({ ctx, input }: UpdateOptions) => {
       rest.rrSegmentQueryValue === null ? Prisma.DbNull : (rest.rrSegmentQueryValue as Prisma.InputJsonValue),
     metadata: rest.metadata === null ? Prisma.DbNull : (rest.metadata as Prisma.InputJsonObject),
     eventTypeColor: eventTypeColor === null ? Prisma.DbNull : (eventTypeColor as Prisma.InputJsonObject),
+    disableGuests: guestsField?.hidden ?? false,
   };
   data.locations = locations ?? undefined;
   if (periodType) {