diff --git a/src/routes/settings.import.tsx b/src/routes/settings.import.tsx
index 51629a1..c6938c8 100644
--- a/src/routes/settings.import.tsx
+++ b/src/routes/settings.import.tsx
@@ -761,7 +761,7 @@ function ImportPage() {
           );
           const toUpdate = withConflict
             .filter((r) => existingByExternalId.has(String(r.external_id)))
-            .map((r) => ({ ...r, id: existingByExternalId.get(String(r.external_id)) }));
+            .map((r) => ({ ...r, id: existingByExternalId.get(String(r.external_id))! }));
           const toInsert = withConflict.filter((r) => !existingByExternalId.has(String(r.external_id)));
 
           if (toUpdate.length > 0) {