diff --git a/server/src/routes/admin.ts b/server/src/routes/admin.ts
index 133902e..b388d8d 100644
--- a/server/src/routes/admin.ts
+++ b/server/src/routes/admin.ts
@@ -476,6 +476,10 @@ export function registerAdminRoutes(app: FastifyInstance, db: DB) {
       if (pfand_cents !== undefined && !isValidCents(pfand_cents)) {
         return sendProblem(req, reply, 400, 'Bad Request', 'invalid pfand_cents');
       }
+      // Deduped once here (existence-checked below, and reused as the
+      // insert order in the transaction) — a repeated id would otherwise
+      // trip bar_drinks' own (bar_id, drink_id) primary key.
+      let uniqueIds: number[] = [];
       if (drink_ids !== undefined) {
         if (!Array.isArray(drink_ids) || !drink_ids.every(did => Number.isInteger(did))) {
           return sendProblem(req, reply, 400, 'Bad Request', 'invalid drink_ids');
@@ -484,7 +488,7 @@ export function registerAdminRoutes(app: FastifyInstance, db: DB) {
         // bogus id threw an uncaught FK-constraint error inside the
         // transaction below (rollback held correctly, but surfaced as a
         // raw 500 instead of a 400).
-        const uniqueIds = [...new Set(drink_ids)];
+        uniqueIds = [...new Set(drink_ids)];
         if (uniqueIds.length > 0) {
           const placeholders = uniqueIds.map(() => '?').join(',');
           const found = db
@@ -508,9 +512,7 @@ export function registerAdminRoutes(app: FastifyInstance, db: DB) {
             const ins = db.prepare(
               'INSERT INTO bar_drinks (bar_id, drink_id, sort_order) VALUES (?, ?, ?)'
             );
-            // Dedupe: a repeated id would otherwise trip bar_drinks' own
-            // (bar_id, drink_id) primary key.
-            [...new Set(drink_ids)].forEach((did, idx) => ins.run(id, did, idx));
+            uniqueIds.forEach((did, idx) => ins.run(id, did, idx));
           }
         })();
       } catch (e: any) {