Fix const reassignment that broke accounting-frontend Docker build.

src/parties/GlobalPartySync.tsx

@@ -18,7 +18,7 @@ export function GlobalPartySync() {
 
     const run = async () => {
       try {
-        const [owners, customersRaw, currentParties] = await Promise.all([
+        const [owners, customersRaw, initialParties] = await Promise.all([
           apiGet<unknown>(ENDPOINTS.OWNERS).then(asList<ApiOwner>),
           apiGet<unknown>(ENDPOINTS.CUSTOMERS),
           acct.get(ACCOUNTING_ENDPOINTS.PARTIES).then(asList<Party>),
@@ -28,6 +28,7 @@ export function GlobalPartySync() {
           ? (customersRaw as ApiCustomer[])
           : ((customersRaw as { results?: ApiCustomer[] }).results ?? [])
 
+        let currentParties = initialParties
         const batches = [
           ...mergeFunZoneParties(owners, currentParties, 'supplier'),
           ...mergeFunZoneParties(customers, currentParties, 'customer'),