Fix: [AEA-4168] - 200 and 409 Response returned for the same Item (#377)

## Summary

https://nhsd-jira.digital.nhs.uk/browse/AEA-4168

2 Conflicting responses are returned for the same item if a 409 error is
found due to a duplicate Task.ID. The expected 409 response is returned,
however a 200 is returned with for the same Task.ID noting that the data
is not committed.

- ✨ New Feature

packages/updatePrescriptionStatus/src/updatePrescriptionStatus.ts

@@ -68,7 +68,6 @@ const lambdaHandler = async (event: APIGatewayProxyEvent): Promise<APIGatewayPro
     logger.info("No entries to process.")
     return response(200, responseEntries)
   }
-
   const entriesValid = validateEntries(requestEntries, responseEntries)
   if (!entriesValid) {
     return response(400, responseEntries)
@@ -155,6 +154,8 @@ export function handleTransactionCancelledException(
   e: TransactionCanceledException,
   responseEntries: Array<BundleEntry>
 ): void {
+  responseEntries.length = 0
+
   e.CancellationReasons?.forEach((reason) => {
     if (reason.Item?.TaskID?.S) {
       const taskId = reason.Item.TaskID.S