diff --git a/migrations/20240530193519_typen.up.sql b/migrations/20240530193519_typen.up.sql
index aa0a00a..68b4081 100644
--- a/migrations/20240530193519_typen.up.sql
+++ b/migrations/20240530193519_typen.up.sql
@@ -1,5 +1,6 @@
 CREATE TABLE IF NOT EXISTS typen (
-    id UUID PRIMARY KEY,
+    typ_id UUID PRIMARY KEY,
+    id CHAR(26) UNIQUE NOT NULL,
     typname VARCHAR NOT NULL,
     erstellt_am TIMESTAMP WITH TIME ZONE NOT NULL,
     geaendert_am TIMESTAMP WITH TIME ZONE NOT NULL
diff --git a/migrations/20240530193528_hersteller.up.sql b/migrations/20240530193528_hersteller.up.sql
index 5c85d05..3f31597 100644
--- a/migrations/20240530193528_hersteller.up.sql
+++ b/migrations/20240530193528_hersteller.up.sql
@@ -1,5 +1,6 @@
 CREATE TABLE IF NOT EXISTS hersteller (
-    id UUID PRIMARY KEY,
+    hersteller_id UUID PRIMARY KEY,
+    id CHAR(26) UNIQUE NOT NULL,
     herstellername VARCHAR NOT NULL,
     erstellt_am TIMESTAMP WITH TIME ZONE NOT NULL,
     geaendert_am TIMESTAMP WITH TIME ZONE NOT NULL
diff --git a/migrations/20240530193533_modelle.up.sql b/migrations/20240530193533_modelle.up.sql
index 1fa9ca9..d7055db 100644
--- a/migrations/20240530193533_modelle.up.sql
+++ b/migrations/20240530193533_modelle.up.sql
@@ -5,12 +5,12 @@ CREATE TABLE IF NOT EXISTS modelle (
     hersteller_id UUID,
 
     CONSTRAINT fk_typ FOREIGN KEY (typ_id)
-    REFERENCES typen (id)
+    REFERENCES typen (typ_id)
     ON DELETE NO ACTION
     ON UPDATE NO ACTION,
 
     CONSTRAINT fk_hersteller FOREIGN KEY (hersteller_id)
-    REFERENCES hersteller (id)
+    REFERENCES hersteller (hersteller_id)
     ON DELETE NO ACTION
     ON UPDATE NO ACTION
 )
diff --git a/migrations/20241202221730_liegenschaften.up.sql b/migrations/20241202221730_liegenschaften.up.sql
index c5f165d..1ea93f9 100644
--- a/migrations/20241202221730_liegenschaften.up.sql
+++ b/migrations/20241202221730_liegenschaften.up.sql
@@ -1,6 +1,6 @@
 CREATE TABLE IF NOT EXISTS liegenschaften (
     id_liegenschaft UUID PRIMARY KEY,
-    id VARCHAR UNIQUE,
+    id CHAR(26) UNIQUE,
     liegenschaftname VARCHAR NOT NULL,
     erstellt_am TIMESTAMP WITH TIME ZONE NOT NULL,
     geaendert_am TIMESTAMP WITH TIME ZONE NOT NULL
diff --git a/src/domain/typ.rs b/src/domain/typ.rs
index 758c8f6..9daf971 100644
--- a/src/domain/typ.rs
+++ b/src/domain/typ.rs
@@ -1,6 +1,7 @@
 pub mod dataloader;
 pub mod entity;
 pub mod model;
+pub mod mutation;
 pub mod queries;
 pub mod repository;
 pub mod service;
diff --git a/src/domain/typ/entity.rs b/src/domain/typ/entity.rs
index b77726a..c0c5e1d 100644
--- a/src/domain/typ/entity.rs
+++ b/src/domain/typ/entity.rs
@@ -1,2 +1,6 @@
 pub mod typ;
-pub use typ::Typ;
+
+// pub use typ::Typ;
+pub use typ::TypErstellen;
+pub use typ::TypLoeschen;
+pub use typ::TypUpdate;
diff --git a/src/domain/typ/entity/typ.rs b/src/domain/typ/entity/typ.rs
index 89944e5..08f59db 100644
--- a/src/domain/typ/entity/typ.rs
+++ b/src/domain/typ/entity/typ.rs
@@ -1,8 +1,19 @@
-use crate::scalar::{Id, Time};
+use crate::scalar::{Id, Time, Ulid};
 
-pub struct Typ {
-    pub id: Id,
+pub struct TypErstellen {
+    pub typ_id: Id,
+    pub id: Ulid,
     pub typname: String,
-    pub erstellt_am: Option<Time>,
-    pub geaendert_am: Option<Time>,
+    pub erstellt_am: Time,
+    pub geaendert_am: Time,
+}
+
+pub struct TypLoeschen {
+    pub id: Ulid,
+}
+
+pub struct TypUpdate {
+    pub id: Ulid,
+    pub typname: String,
+    pub geaendert_am: Time,
 }
diff --git a/src/domain/typ/model/typ.rs b/src/domain/typ/model/typ.rs
index a0356ba..7fac9cd 100644
--- a/src/domain/typ/model/typ.rs
+++ b/src/domain/typ/model/typ.rs
@@ -1,20 +1,20 @@
 use async_graphql::{ComplexObject, SimpleObject};
 
-use crate::scalar::{Id, Time};
+use crate::scalar::{Time, Ulid};
 
 #[derive(sqlx::FromRow, SimpleObject, Clone, Debug)]
 #[graphql(complex)]
 pub struct Typ {
-    /// Die UUID einer Typ
-    pub id: Id,
+    /// Die Ulid eines Gerätetypen
+    pub id: Ulid,
 
     /// Der Typname
     pub typname: String,
 
-    /// Wann die Typ erstellt wurde
+    /// Wann der Typ erstellt wurde
     pub erstellt_am: Time,
 
-    /// Wann die Typ geaendert wurde
+    /// Wann der Typ geaendert wurde
     pub geaendert_am: Time,
 }
 
diff --git a/src/domain/typ/model/typ_loeschen_input.rs b/src/domain/typ/model/typ_loeschen_input.rs
index 1caab1f..ba3fb5e 100644
--- a/src/domain/typ/model/typ_loeschen_input.rs
+++ b/src/domain/typ/model/typ_loeschen_input.rs
@@ -1,9 +1,9 @@
 use async_graphql::InputObject;
 
-use crate::scalar::Id;
+use crate::scalar::Ulid;
 
 #[derive(InputObject)]
 pub struct TypLoeschenInput {
-    /// Die ID einer Typ
-    pub id: Id,
+    /// Die ULID von einem Typ
+    pub id: Ulid,
 }
diff --git a/src/domain/typ/model/typ_update_input.rs b/src/domain/typ/model/typ_update_input.rs
index a062125..cb45fbd 100644
--- a/src/domain/typ/model/typ_update_input.rs
+++ b/src/domain/typ/model/typ_update_input.rs
@@ -1,10 +1,11 @@
-use crate::scalar::Id;
 use async_graphql::InputObject;
 
+use crate::scalar::Ulid;
+
 #[derive(InputObject)]
 pub struct TypUpdateInput {
-    /// Die ID einer Typ
-    pub id: Id,
+    /// Die ULID von einem Typen
+    pub id: Ulid,
 
     /// Der Name einer Typ
     pub typname: String,
diff --git a/src/domain/typ/mutation.rs b/src/domain/typ/mutation.rs
new file mode 100644
index 0000000..b6a61e0
--- /dev/null
+++ b/src/domain/typ/mutation.rs
@@ -0,0 +1,3 @@
+pub mod typ;
+
+pub use typ::TypMutation;
diff --git a/src/mutations/typ.rs b/src/domain/typ/mutation/typ.rs
similarity index 91%
rename from src/mutations/typ.rs
rename to src/domain/typ/mutation/typ.rs
index 57b39a9..587bf36 100644
--- a/src/mutations/typ.rs
+++ b/src/domain/typ/mutation/typ.rs
@@ -12,9 +12,9 @@ pub struct TypMutation;
 #[async_graphql::Object]
 impl TypMutation {
     async fn erstelle_typ(&self, ctx: &Context<'_>, input: TypErstelleInput) -> FieldResult<Typ> {
-        let pool = ctx.data::<PgPool>()?;
+        let pool = ctx.data::<PgPool>()?.clone();
 
-        let typ = Service::new(pool.clone()).typ_erstellen(input).await?;
+        let typ = Service::new(pool).typ_erstellen(input).await?;
         Ok(typ)
     }
 
@@ -40,6 +40,7 @@ impl TypMutation {
 
     async fn loesche_typ(&self, ctx: &Context<'_>, input: TypLoeschenInput) -> FieldResult<Typ> {
         let pool = ctx.data::<PgPool>()?;
+
         let typ = Service::new(pool.clone()).typ_loeschen(input).await?;
         Ok(typ)
     }
diff --git a/src/domain/typ/repository/typ_erstelle_viele.rs b/src/domain/typ/repository/typ_erstelle_viele.rs
index 7c90ee5..ab321b0 100644
--- a/src/domain/typ/repository/typ_erstelle_viele.rs
+++ b/src/domain/typ/repository/typ_erstelle_viele.rs
@@ -4,30 +4,33 @@ use super::Repository;
 use crate::database::Queryer;
 use crate::domain::typ::entity;
 use crate::domain::typ::model::{self};
-use crate::scalar::{Id, Time};
+use crate::scalar::{Id, Time, Ulid};
 
 impl Repository {
     pub async fn typ_viele_erstellen<'c, C: Queryer<'c>>(
         &self,
         db: C,
-        typen: &[entity::Typ], // input: &[Typ],
+        typen: &[entity::TypErstellen], // input: &[Typ],
     ) -> Result<Vec<model::Typ>, Error> {
-        let id: Vec<Id> = typen.iter().map(|t| t.id).collect();
+        let typ_id: Vec<Id> = typen.iter().map(|t| t.typ_id).collect();
+        let id: Vec<Ulid> = typen.iter().map(|t| t.id.to_string()).collect();
         let typnamen: Vec<String> = typen.iter().map(|t| t.typname.clone()).collect();
-        let erstellt_am: Vec<Option<Time>> = typen.iter().map(|t| t.erstellt_am).collect();
-        let geaendert_am: Vec<Option<Time>> = typen.iter().map(|t| t.geaendert_am).collect();
+        let erstellt_am: Vec<Time> = typen.iter().map(|t| t.erstellt_am).collect();
+        let geaendert_am: Vec<Time> = typen.iter().map(|t| t.geaendert_am).collect();
 
         const QUERY: &str = r#"
-            INSERT INTO typen (id, typname, erstellt_am, geaendert_am)
+            INSERT INTO typen (typ_id, id, typname, erstellt_am, geaendert_am)
             SELECT * FROM UNNEST(
                 $1::uuid[],
                 $2::text[],
-                $3::TIMESTAMP[],
-                $4::TIMESTAMP[]
+                $3::text[],
+                $4::TIMESTAMP[],
+                $5::TIMESTAMP[]
             ) RETURNING id, erstellt_am, geaendert_am, typname;
         "#;
 
         let rows = sqlx::query_as::<_, model::Typ>(QUERY)
+            .bind(typ_id)
             .bind(id)
             .bind(typnamen)
             .bind(erstellt_am)
diff --git a/src/domain/typ/repository/typ_erstellen.rs b/src/domain/typ/repository/typ_erstellen.rs
index e6f5cb5..80cd926 100644
--- a/src/domain/typ/repository/typ_erstellen.rs
+++ b/src/domain/typ/repository/typ_erstellen.rs
@@ -8,16 +8,17 @@ impl Repository {
     pub async fn typ_erstellen<'c, C: Queryer<'c>>(
         &self,
         db: C,
-        typ: &entity::Typ,
+        typ: &entity::TypErstellen,
     ) -> Result<model::Typ, Error> {
         const QUERY: &str = r#"
-            INSERT INTO typen (id, erstellt_am, geaendert_am, typname) VALUES (
-                $1, $2, $3, $4
+            INSERT INTO typen (typ_id, id, erstellt_am, geaendert_am, typname) VALUES (
+                $1, $2, $3, $4, $5
             ) RETURNING id, erstellt_am, geaendert_am, typname;
         "#;
 
         let typ = sqlx::query_as::<_, model::Typ>(QUERY)
-            .bind(typ.id)
+            .bind(typ.typ_id)
+            .bind(typ.id.to_string())
             .bind(typ.erstellt_am)
             .bind(typ.geaendert_am)
             .bind(&typ.typname)
diff --git a/src/domain/typ/repository/typ_loeschen.rs b/src/domain/typ/repository/typ_loeschen.rs
index 3e4895b..a582166 100644
--- a/src/domain/typ/repository/typ_loeschen.rs
+++ b/src/domain/typ/repository/typ_loeschen.rs
@@ -8,14 +8,14 @@ impl Repository {
     pub async fn typ_loeschen<'c, C: Queryer<'c>>(
         &self,
         db: C,
-        typ: &entity::Typ,
+        typ: &entity::TypLoeschen,
     ) -> Result<model::Typ, Error> {
         const QUERY: &str = r#"
             DELETE FROM typen WHERE id=$1 RETURNING id, erstellt_am, geaendert_am, typname;
         "#;
 
         let typ = sqlx::query_as::<_, model::Typ>(QUERY)
-            .bind(typ.id)
+            .bind(typ.id.to_string())
             .fetch_one(db)
             .await?;
 
diff --git a/src/domain/typ/repository/typ_update.rs b/src/domain/typ/repository/typ_update.rs
index 9ffc59e..0bb62da 100644
--- a/src/domain/typ/repository/typ_update.rs
+++ b/src/domain/typ/repository/typ_update.rs
@@ -8,7 +8,7 @@ impl Repository {
     pub async fn typ_update<'c, C: Queryer<'c>>(
         &self,
         db: C,
-        typ: &entity::Typ,
+        typ: &entity::TypUpdate,
     ) -> Result<model::Typ, Error> {
         const QUERY: &str = r#"
             UPDATE typen
@@ -17,7 +17,7 @@ impl Repository {
         "#;
 
         let typ = sqlx::query_as::<_, model::Typ>(QUERY)
-            .bind(typ.id)
+            .bind(typ.id.to_string())
             .bind(typ.geaendert_am)
             .bind(&typ.typname)
             .fetch_one(db)
diff --git a/src/domain/typ/service/typ_erstellen.rs b/src/domain/typ/service/typ_erstellen.rs
index f14cb4b..1d66c62 100644
--- a/src/domain/typ/service/typ_erstellen.rs
+++ b/src/domain/typ/service/typ_erstellen.rs
@@ -10,14 +10,15 @@ use crate::domain::typ::{
 
 impl Service {
     pub async fn typ_erstellen(&self, input: TypErstelleInput) -> Result<model::Typ, Error> {
-        let typ_input = entity::Typ {
-            id: Ulid::new().into(),
+        let typ_erstellen = entity::TypErstellen {
+            typ_id: Ulid::new().into(),
+            id: Ulid::new().to_string(),
             typname: input.typname,
-            erstellt_am: Some(Utc::now()),
-            geaendert_am: Some(Utc::now()),
+            erstellt_am: Utc::now(),
+            geaendert_am: Utc::now(),
         };
 
-        let typ = self.repo.typ_erstellen(&self.db, &typ_input).await?;
+        let typ = self.repo.typ_erstellen(&self.db, &typ_erstellen).await?;
         Ok(typ)
     }
 }
diff --git a/src/domain/typ/service/typ_erstellen_viele.rs b/src/domain/typ/service/typ_erstellen_viele.rs
index d76e833..b9c335e 100644
--- a/src/domain/typ/service/typ_erstellen_viele.rs
+++ b/src/domain/typ/service/typ_erstellen_viele.rs
@@ -13,19 +13,20 @@ impl Service {
         &self,
         input: &[TypErstelleInput],
     ) -> Result<Vec<model::Typ>, Error> {
-        let typen_input: Vec<entity::Typ> = input
+        let typen_erstellen: Vec<entity::TypErstellen> = input
             .iter()
-            .map(|t| entity::Typ {
-                id: Ulid::new().into(),
+            .map(|t| entity::TypErstellen {
+                typ_id: Ulid::new().into(),
+                id: Ulid::new().to_string(),
                 typname: t.typname.clone(),
-                erstellt_am: Some(Utc::now()),
-                geaendert_am: Some(Utc::now()),
+                erstellt_am: Utc::now(),
+                geaendert_am: Utc::now(),
             })
             .collect();
 
         let typen = self
             .repo
-            .typ_viele_erstellen(&self.db, &typen_input)
+            .typ_viele_erstellen(&self.db, &typen_erstellen)
             .await?;
 
         Ok(typen)
diff --git a/src/domain/typ/service/typ_loeschen.rs b/src/domain/typ/service/typ_loeschen.rs
index c4f4c52..bd52b06 100644
--- a/src/domain/typ/service/typ_loeschen.rs
+++ b/src/domain/typ/service/typ_loeschen.rs
@@ -1,5 +1,4 @@
 use anyhow::Error;
-use chrono::Utc;
 
 use super::Service;
 use crate::domain::typ::{
@@ -9,14 +8,9 @@ use crate::domain::typ::{
 
 impl Service {
     pub async fn typ_loeschen(&self, input: TypLoeschenInput) -> Result<model::Typ, Error> {
-        let typ_input = entity::Typ {
-            id: input.id,
-            typname: String::new(),
-            erstellt_am: None,
-            geaendert_am: Some(Utc::now()),
-        };
+        let typ_loeschen = entity::TypLoeschen { id: input.id };
 
-        let typ = self.repo.typ_loeschen(&self.db, &typ_input).await?;
+        let typ = self.repo.typ_loeschen(&self.db, &typ_loeschen).await?;
         Ok(typ)
     }
 }
diff --git a/src/domain/typ/service/typ_update.rs b/src/domain/typ/service/typ_update.rs
index d7644fb..9163904 100644
--- a/src/domain/typ/service/typ_update.rs
+++ b/src/domain/typ/service/typ_update.rs
@@ -9,11 +9,10 @@ use crate::domain::typ::{
 
 impl Service {
     pub async fn typ_update(&self, input: TypUpdateInput) -> Result<model::Typ, Error> {
-        let typ_input = entity::Typ {
+        let typ_input = entity::TypUpdate {
             id: input.id,
             typname: input.typname,
-            erstellt_am: None,
-            geaendert_am: Some(Utc::now()),
+            geaendert_am: Utc::now(),
         };
 
         let typ = self.repo.typ_update(&self.db, &typ_input).await?;
diff --git a/src/mutations/mod.rs b/src/mutations/mod.rs
index b9e67e6..4437947 100644
--- a/src/mutations/mod.rs
+++ b/src/mutations/mod.rs
@@ -4,13 +4,14 @@ pub mod gruppe;
 // pub mod modell;
 pub mod liegenschaft;
 pub mod rolle;
-pub mod typ;
 
 use async_graphql::MergedObject;
 
+use crate::domain::typ::mutation::TypMutation;
+
 #[derive(MergedObject, Default)]
 pub struct Mutation(
-    typ::TypMutation,
+    TypMutation,
     // hersteller::HerstellerMutation,
     // modell::ModellMutation,
     benutzer::BenutzerMutation,
diff --git a/src/scalar.rs b/src/scalar.rs
index fe5815d..6793fc4 100644
--- a/src/scalar.rs
+++ b/src/scalar.rs
@@ -8,3 +8,8 @@ pub type Time = chrono::DateTime<chrono::Utc>;
 /// The ID type appears in a JSON response as a String; however, it is not intended to be human-readable.
 /// When expected as an input type, any string (such as "4") or integer (such as 4) input value will be accepted as an ID.
 pub type Id = Uuid;
+
+/// ödsklfjsdf
+/// debug_assert_eq!(ödsklfjsdfasdfas
+/// ödsklfjsdfasdfasdfsa,
+pub type Ulid = String;