diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 03ea4e4..a4103a3 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -19,7 +19,7 @@ model Event {
   disciplines   Discipline[]
   organisations Organisation[]
   campaign      Campaign[]
-  visual        VisualElement[]
+  visual        Media[]
 }
 
 model Campaign {
@@ -29,7 +29,7 @@ model Campaign {
   expiresAt DateTime
 
   links   Link[]
-  event   Event  @relation(fields: [eventId], references: [id])
+  event   Event  @relation(fields: [eventId], references: [id], onDelete: Cascade)
   eventId Int    @unique
 }
 
@@ -38,9 +38,9 @@ model Link {
   pid  String @unique @default(dbgenerated("gen_random_uuid()")) @db.Uuid
   link String
 
-  campaign   Campaign @relation(fields: [campaignId], references: [id])
+  campaign   Campaign @relation(fields: [campaignId], references: [id], onDelete: Cascade)
   campaignId Int
-  group      Group?   @relation(fields: [groupId], references: [id])
+  group      Group    @relation(fields: [groupId], references: [id], onDelete: Cascade)
   groupId    Int      @unique
 }
 
@@ -56,17 +56,17 @@ model Admin {
 }
 
 model Discipline {
-  id          Int          @id @default(autoincrement())
-  pid         String       @unique @default(dbgenerated("gen_random_uuid()")) @db.Uuid
+  id          Int    @id @default(autoincrement())
+  pid         String @unique @default(dbgenerated("gen_random_uuid()")) @db.Uuid
   name        String
   minTeamSize Int
   maxTeamSize Int
-  roles       RoleSchema[]
 
+  roles   RoleSchema[]
   teams   Team[]
-  event   Event           @relation(fields: [eventId], references: [id])
+  event   Event        @relation(fields: [eventId], references: [id], onDelete: Cascade)
   eventId Int
-  visual  VisualElement[]
+  visual  Media[]
 }
 
 model RoleSchema {
@@ -76,9 +76,9 @@ model RoleSchema {
   schema Json
 
   roles        Role[]
-  discipline   Discipline      @relation(fields: [disciplineId], references: [id])
+  discipline   Discipline @relation(fields: [disciplineId], references: [id], onDelete: Cascade)
   disciplineId Int
-  visual       VisualElement[]
+  visual       Media[]
 }
 
 model Team {
@@ -88,7 +88,7 @@ model Team {
   leaderEmail String
 
   roles        Role[]     @relation(name: "participants")
-  discipline   Discipline @relation(fields: [disciplineId], references: [id])
+  discipline   Discipline @relation(fields: [disciplineId], references: [id], onDelete: Cascade)
   disciplineId Int
 }
 
@@ -100,7 +100,7 @@ model Participant {
   gender    Gender
   relevance Job
 
-  group   Group  @relation(fields: [groupId], references: [id])
+  group   Group  @relation(fields: [groupId], references: [id], onDelete: Cascade)
   groupId Int
   roles   Role[]
 }
@@ -108,14 +108,13 @@ model Participant {
 model Role {
   id    Int    @id @default(autoincrement())
   pid   String @unique @default(dbgenerated("gen_random"))
-  name  String //e.g. runner, swimmer,...
   score String
 
-  participant   Participant? @relation(fields: [participantId], references: [id])
+  participant   Participant? @relation(fields: [participantId], references: [id], onDelete: SetNull)
   participantId Int?
-  team          Team         @relation(name: "participants", fields: [teamId], references: [id])
+  team          Team         @relation(name: "participants", fields: [teamId], references: [id], onDelete: Cascade)
   teamId        Int
-  schema        RoleSchema   @relation(fields: [schemaId], references: [id])
+  schema        RoleSchema   @relation(fields: [schemaId], references: [id], onDelete: Cascade)
   schemaId      Int
 }
 
@@ -125,7 +124,7 @@ model Organisation {
   name String
 
   groups  Group[]
-  event   Event   @relation(fields: [eventId], references: [id])
+  event   Event   @relation(fields: [eventId], references: [id], onDelete: Cascade)
   eventId Int
 }
 
@@ -136,18 +135,18 @@ model Group {
   user_limit Int    @default(40)
   level      Int
 
-  oragnisation   Organisation  @relation(fields: [oragnisationId], references: [id])
+  oragnisation   Organisation  @relation(fields: [oragnisationId], references: [id], onDelete: Cascade)
   oragnisationId Int
   participants   Participant[]
   link           Link?
   admins         Admin[]
 }
 
-model VisualElement {
+model Media {
   id          Int    @id @default(autoincrement())
   pid         String @unique @default(dbgenerated("gen_random_uuid()")) @db.Uuid
   description String
-  location    String
+  location    String @unique
 
   event      Event[]
   discipline Discipline[]