exclude primary FBA destination for second producer

scripts/admin-test-env-acceptance.mjs

@@ -1521,6 +1521,8 @@ export class AcceptanceRun {
     this.context.orderFulfillmentType = fulfillmentType
     this.context.phase4ProducerMatrixMarker = matrixMarker
     if (destinationType === 'FBA' && label === 'FBA-SECOND') {
+      const existingFba = this.createdResources.phase4InboundProducerFixtures?.byDestinationType?.FBA || []
+      const primaryCode = existingFba.map(item => String(item?.destinationWarehouseCode || '').trim().toUpperCase()).find(Boolean)
       this.context.waitSplitRoute = {
         ...(this.context.waitSplitRoute || {}),
         // The normal order route rotates the destination list from randomIndex;
@@ -1528,6 +1530,7 @@ export class AcceptanceRun {
         // dispatch can exercise a multi-destination candidate set.
         randomIndex: 17,
         destinationIndex: 1,
+        excludeDestinationCodes: primaryCode ? [primaryCode] : [],
       }
     }
     try {

scripts/admin-test-env-modules/orders.mjs

@@ -290,6 +290,8 @@ async function loadMasterData(context, merchantToken) {
   // a producer intended for the second FBA destination can silently reuse ABE4.
   if (destinationType !== 'PRIVATE') {
     destinations = [...new Map(destinations.map(value => [String(value.warehouseCode).trim().toUpperCase(), value])).values()]
+    const excluded = new Set((fixedRoute.excludeDestinationCodes || []).map(value => String(value).trim().toUpperCase()).filter(Boolean))
+    if (excluded.size) destinations = destinations.filter(value => !excluded.has(String(value.warehouseCode).trim().toUpperCase()))
   }
 
   let pricingResult