diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 9be7150..cabd3e2 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -10,10 +10,11 @@ generator client {
 }
 
 model Event {
-  id   Int      @id @default(autoincrement()) // Primary key
-  pid  String   @unique @default(dbgenerated("gen_random_uuid()")) @db.Uuid // Public key
-  date DateTime
-  name String
+  id          Int      @id @default(autoincrement()) // Primary key
+  pid         String   @unique @default(dbgenerated("gen_random_uuid()")) @db.Uuid // Public key
+  date        DateTime
+  name        String
+  description String
 
   disciplines   Discipline[]
   admins        Admin[]
@@ -24,11 +25,12 @@ model Event {
 model Campaign {
   id        Int      @id @default(autoincrement())
   pid       String   @unique @default(dbgenerated("gen_random_uuid()")) @db.Uuid
+  start     DateTime
   expiresAt DateTime
 
-  event   Event        @relation(fields: [eventId], references: [id])
   links   Link[]
-  eventId Int          @unique
+  event   Event  @relation(fields: [eventId], references: [id])
+  eventId Int    @unique
 }
 
 model Link {
@@ -38,7 +40,7 @@ model Link {
 
   campaign   Campaign @relation(fields: [campaignId], references: [id])
   campaignId Int
-  group      Group    @relation(fields: [groupId], references: [id])
+  group      Group?   @relation(fields: [groupId], references: [id])
   groupId    Int      @unique
 }
 
@@ -48,6 +50,8 @@ model Admin {
   name             String
   password         String // TODO: Probably specify hash size (VarChar or some other type)
   permission_level AdminLevel @default(STANDARD)
+  revision         String
+  groups           Group[]
 
   event   Event @relation(fields: [eventId], references: [id])
   eventId Int
@@ -117,16 +121,17 @@ model Organisation {
 }
 
 model Group {
-  id          Int    @id @default(autoincrement())
-  pid         String @unique @default(dbgenerated("gen_random_uuid()")) @db.Uuid
-  name        String
-  user_limit  Int    @default(40)
-  level       Int
+  id         Int    @id @default(autoincrement())
+  pid        String @unique @default(dbgenerated("gen_random_uuid()")) @db.Uuid
+  name       String
+  user_limit Int    @default(40)
+  level      Int
 
   oragnisation   Organisation  @relation(fields: [oragnisationId], references: [id])
   oragnisationId Int
   participants   Participant[]
   link           Link?
+  admins         Admin[]
 }
 
 enum AdminLevel {
@@ -137,5 +142,5 @@ enum AdminLevel {
 enum Gender {
   MALE
   FEMALE
-  OTHERS
+  OTHER
 }
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