diff --git a/src/routes/settings.import.tsx b/src/routes/settings.import.tsx
index 2a40b3b..5873da6 100644
--- a/src/routes/settings.import.tsx
+++ b/src/routes/settings.import.tsx
@@ -825,7 +825,7 @@ function ImportPage() {
     // archived client + archived case from the row hints, then attach a
     // placeholder voided invoice so the row imports as "already invoiced".
     if (cfg.table === "time_entries" || cfg.table === "expenses") {
-      const placeholderInvoiceByClient = new Map<string, string>();
+      // Cache of (clientId,invoiceNumber) -> invoiceId is defined below
       const ensureArchivedClient = async (name: string, extId?: string | null): Promise<string | null> => {
         const key = name.toLowerCase().trim();
         const existing = (extId && ctx.clientByExt.get(String(extId))) || ctx.clientByName.get(key);