diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 8a60fe1..7deb2d3 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -159,7 +159,7 @@ model Game {
   slug                    String
   description             String? @db.LongText
   description_preview     String? @db.LongText
-  year_published          Int?
+  year_published          Int? @db.Year
   min_players             Int?
   max_players             Int?
   min_playtime            Int?
@@ -195,6 +195,7 @@ model Game {
 model GameName {
   id          String @id @default(cuid())
   name        String
+  slug        String
   game_id     String
   game        Game @relation(references: [id], fields: [game_id])
   created_at  DateTime @default(now()) @db.Timestamp(6)
@@ -247,6 +248,7 @@ model Mechanic {
 model Designer {
   id                String    @id @default(cuid())
   name              String
+  slug              String
   external_id       String    @unique
   games             Game[]
   primary_designer  Game[]    @relation("PrimaryDesigners")
@@ -260,7 +262,7 @@ model Designer {
 model Artist {
   id            String    @id @default(cuid())
   name          String
-  external_id   String    @unique
+  slug          String    @unique
   games         Game[]
   created_at    DateTime  @default(now()) @db.Timestamp(6)
   updated_at    DateTime  @updatedAt @db.Timestamp(6)
diff --git a/prisma/seed.ts b/prisma/seed.ts
index 07d6d1b..561ba40 100644
--- a/prisma/seed.ts
+++ b/prisma/seed.ts
@@ -1,5 +1,6 @@
 import { PrismaClient } from '@prisma/client';
 import kebabCase from 'just-kebab-case';
+import { createId } from '@paralleldrive/cuid2';
 import categories from './categories.json' assert { type: 'json' };
 import mechanics from './mechanics.json' assert { type: 'json' };
 
@@ -49,6 +50,29 @@ async function main() {
 		console.log('Categories created.');
 	}
 
+	await prisma.publisher.create({
+		data: {
+			name: 'Unknown',
+			slug: 'unknown',
+			external_id: createId()
+		}
+	});
+
+	await prisma.designer.create({
+		data: {
+			name: 'Unknown',
+			slug: 'unknown',
+			external_id: createId()
+		}
+	});
+
+	await prisma.artist.create({
+		data: {
+			name: 'Unknown',
+			slug: 'unknown'
+		}
+	});
+
 	// for (const p of userData) {
 	// 	const user = await prisma.user.create({
 	// 		data: {