diff --git a/backend/prisma/seed.ts b/backend/prisma/seed.ts
index b04eb7f..80c465e 100644
--- a/backend/prisma/seed.ts
+++ b/backend/prisma/seed.ts
@@ -2,30 +2,80 @@ import { PrismaClient, Prisma } from '@prisma/client';
 
 const prisma = new PrismaClient();
 
-const teamData: Prisma.TeamCreateInput[] = [
+const teams: Prisma.TeamCreateInput[] = [
   {
     id: '1',
     name: '001',
+    pairs: {
+      create: [
+        {
+          id: '1',
+          name: 'a',
+        },
+        {
+          id: '2',
+          name: 'b',
+        },
+      ],
+    },
   },
   {
     id: '2',
     name: '002',
+    pairs: {
+      create: [
+        {
+          id: '3',
+          name: 'a',
+        },
+        {
+          id: '4',
+          name: 'b',
+        },
+      ],
+    },
   },
   {
     id: '3',
     name: '003',
+    pairs: {
+      create: [
+        {
+          id: '5',
+          name: 'a',
+        },
+        {
+          id: '6',
+          name: 'b',
+        },
+      ],
+    },
   },
   {
     id: '4',
     name: '004',
+    pairs: {
+      create: [
+        {
+          id: '7',
+          name: 'a',
+        },
+        {
+          id: '8',
+          name: 'b',
+        },
+      ],
+    },
   },
 ];
 
 async function main() {
   console.log(`Start seeding ...`);
-  for (const u of teamData) {
-    const team = await prisma.team.create({
-      data: u,
+  for (const u of teams) {
+    const team = await prisma.team.upsert({
+      where: { id: u.id },
+      update: {},
+      create: u,
     });
     console.log(`Created user with id: ${team.id}`);
   }