diff --git a/src/app/api/admin/lesson-files/route.ts b/src/app/api/admin/lesson-files/route.ts
index f4469ef..c515f98 100644
--- a/src/app/api/admin/lesson-files/route.ts
+++ b/src/app/api/admin/lesson-files/route.ts
@@ -5,14 +5,14 @@ import { prisma } from "@/lib/prisma";
 import { uploadFile, deleteFile } from "@/lib/s3";
 import { randomUUID } from "crypto";
 
-async function requireAdmin(req: NextRequest) {
+async function requireAdmin() {
   const session = await auth.api.getSession({ headers: await headers() });
   if (!session || session.user.role !== "admin") return null;
   return session;
 }
 
 export async function POST(req: NextRequest) {
-  if (!await requireAdmin(req)) {
+  if (!await requireAdmin()) {
     return NextResponse.json({ error: "Forbidden" }, { status: 403 });
   }
 
@@ -22,20 +22,32 @@ export async function POST(req: NextRequest) {
   const label = (form.get("label") as string | null)?.trim() || null;
   if (!file || !lessonId) return NextResponse.json({ error: "Missing fields" }, { status: 400 });
 
+  const name = label ?? file.name;
+  const existing = await prisma.lessonFile.findFirst({ where: { lessonId, name } });
+
   const ext = file.name.split(".").pop() ?? "bin";
   const key = `lessons/${lessonId}/${randomUUID()}.${ext}`;
   const buffer = Buffer.from(await file.arrayBuffer());
   const url = await uploadFile(key, buffer, file.type);
 
-  const lessonFile = await prisma.lessonFile.create({
-    data: { lessonId, name: label ?? file.name, url, size: file.size },
-  });
+  if (existing) {
+    const oldKey = existing.url.split(`/${process.env.S3_BUCKET}/`)[1];
+    if (oldKey) await deleteFile(oldKey).catch(() => {});
+    const lessonFile = await prisma.lessonFile.update({
+      where: { id: existing.id },
+      data: { url, size: file.size },
+    });
+    return NextResponse.json(lessonFile);
+  }
 
+  const lessonFile = await prisma.lessonFile.create({
+    data: { lessonId, name, url, size: file.size },
+  });
   return NextResponse.json(lessonFile);
 }
 
 export async function PATCH(req: NextRequest) {
-  if (!await requireAdmin(req)) {
+  if (!await requireAdmin()) {
     return NextResponse.json({ error: "Forbidden" }, { status: 403 });
   }
 
@@ -51,12 +63,15 @@ export async function PATCH(req: NextRequest) {
 }
 
 export async function DELETE(req: NextRequest) {
-  if (!await requireAdmin(req)) {
+  if (!await requireAdmin()) {
     return NextResponse.json({ error: "Forbidden" }, { status: 403 });
   }
 
-  const { fileId, key } = await req.json();
-  if (key) await deleteFile(key).catch(() => {});
+  const { fileId, url } = await req.json();
+  if (url) {
+    const key = (url as string).split(`/${process.env.S3_BUCKET}/`)[1];
+    if (key) await deleteFile(key).catch(() => {});
+  }
   await prisma.lessonFile.delete({ where: { id: fileId } });
   return NextResponse.json({ ok: true });
 }
diff --git a/src/components/admin/lesson-files-manager.tsx b/src/components/admin/lesson-files-manager.tsx
index c4685d9..8d6f5f8 100644
--- a/src/components/admin/lesson-files-manager.tsx
+++ b/src/components/admin/lesson-files-manager.tsx
@@ -36,12 +36,12 @@ export function LessonFilesManager({ lessonId, initialFiles }: { lessonId: strin
     e.target.value = "";
   }
 
-  async function handleDelete(fileId: string) {
+  async function handleDelete(fileId: string, url: string) {
     if (!confirm("Удалить файл?")) return;
     await fetch("/api/admin/lesson-files", {
       method: "DELETE",
       headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ fileId }),
+      body: JSON.stringify({ fileId, url }),
     });
     setFiles((prev) => prev.filter((f) => f.id !== fileId));
   }
@@ -122,7 +122,7 @@ export function LessonFilesManager({ lessonId, initialFiles }: { lessonId: strin
               </span>
               <button
                 type="button"
-                onClick={() => handleDelete(f.id)}
+                onClick={() => handleDelete(f.id, f.url)}
                 className="text-xs"
                 style={{ color: "oklch(0.577 0.245 27.325)" }}
               >