diff --git a/Cargo.toml b/Cargo.toml
index 546be84..6c01aac 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,6 +28,7 @@ hydrate = [
   "leptos_router/hydrate",
   "katex/wasm-js",
 ]
+diesel-derive-newtype = ["dep:diesel-derive-newtype"]
 
 # This profile significantly speeds up build time. If debug info is needed you can comment the line
 # out temporarily, but make sure to leave this in the main branch.
diff --git a/diesel.toml b/diesel.toml
index 85fd363..029fb95 100644
--- a/diesel.toml
+++ b/diesel.toml
@@ -2,7 +2,7 @@
 # see https://diesel.rs/guides/configuring-diesel-cli
 
 [print_schema]
-file = "src/database/schema.rs"
+file = "src/backend/database/schema.rs"
 custom_type_derives = ["diesel::query_builder::QueryId"]
 
 [migrations_directory]
diff --git a/migrations/2024-11-11-142910_conflict-constraint/down.sql b/migrations/2024-11-11-142910_conflict-constraint/down.sql
new file mode 100644
index 0000000..a37e1a7
--- /dev/null
+++ b/migrations/2024-11-11-142910_conflict-constraint/down.sql
@@ -0,0 +1,2 @@
+ALTER TABLE conflict DROP CONSTRAINT conflict_creator_id_fkey;
+ALTER TABLE conflict ADD CONSTRAINT conflict_creator_id_fkey FOREIGN KEY (creator_id) REFERENCES local_user(id) ON UPDATE CASCADE ON DELETE CASCADE;
\ No newline at end of file
diff --git a/migrations/2024-11-11-142910_conflict-constraint/up.sql b/migrations/2024-11-11-142910_conflict-constraint/up.sql
new file mode 100644
index 0000000..33dff81
--- /dev/null
+++ b/migrations/2024-11-11-142910_conflict-constraint/up.sql
@@ -0,0 +1,2 @@
+ALTER TABLE conflict DROP CONSTRAINT conflict_creator_id_fkey;
+ALTER TABLE conflict ADD CONSTRAINT conflict_creator_id_fkey FOREIGN KEY (creator_id) REFERENCES person(id) ON UPDATE CASCADE ON DELETE CASCADE;
\ No newline at end of file
diff --git a/src/backend/api/article.rs b/src/backend/api/article.rs
index 12f5bd4..45265c6 100644
--- a/src/backend/api/article.rs
+++ b/src/backend/api/article.rs
@@ -116,7 +116,12 @@ pub(in crate::backend::api) async fn edit_article(
         edit_form.new_text.push('\n');
     }
 
+    dbg!(
+        &edit_form.previous_version_id,
+        &original_article.latest_version
+    );
     if edit_form.previous_version_id == original_article.latest_version {
+        dbg!("no conflict");
         // No intermediate changes, simply submit new version
         submit_article_update(
             edit_form.new_text.clone(),
@@ -140,7 +145,7 @@ pub(in crate::backend::api) async fn edit_article(
             hash: EditVersion::new(&patch.to_string()),
             diff: patch.to_string(),
             summary: edit_form.summary.clone(),
-            creator_id: user.local_user.id,
+            creator_id: user.person.id,
             article_id: original_article.article.id,
             previous_version_id: previous_version.hash,
         };
diff --git a/src/backend/api/mod.rs b/src/backend/api/mod.rs
index f3882c2..ac6f364 100644
--- a/src/backend/api/mod.rs
+++ b/src/backend/api/mod.rs
@@ -92,7 +92,7 @@ async fn edit_conflicts(
     Extension(user): Extension<LocalUserView>,
     data: Data<IbisData>,
 ) -> MyResult<Json<Vec<ApiConflict>>> {
-    let conflicts = DbConflict::list(&user.local_user, &data)?;
+    let conflicts = DbConflict::list(&user.person, &data)?;
     let conflicts: Vec<ApiConflict> = try_join_all(conflicts.into_iter().map(|c| {
         let data = data.reset_request_count();
         async move { c.to_api_conflict(&data).await }
diff --git a/src/backend/database/conflict.rs b/src/backend/database/conflict.rs
index f2d3d19..2badaa8 100644
--- a/src/backend/database/conflict.rs
+++ b/src/backend/database/conflict.rs
@@ -5,7 +5,7 @@ use crate::{
         federation::activities::submit_article_update,
         utils::generate_article_version,
     },
-    common::{ApiConflict, DbArticle, DbEdit, DbLocalUser, EditVersion},
+    common::{ApiConflict, DbArticle, DbEdit, DbPerson, EditVersion, PersonId},
 };
 use activitypub_federation::config::Data;
 use diesel::{
@@ -32,7 +32,7 @@ pub struct DbConflict {
     pub hash: EditVersion,
     pub diff: String,
     pub summary: String,
-    pub creator_id: i32,
+    pub creator_id: PersonId,
     pub article_id: i32,
     pub previous_version_id: EditVersion,
 }
@@ -43,7 +43,7 @@ pub struct DbConflictForm {
     pub hash: EditVersion,
     pub diff: String,
     pub summary: String,
-    pub creator_id: i32,
+    pub creator_id: PersonId,
     pub article_id: i32,
     pub previous_version_id: EditVersion,
 }
@@ -56,10 +56,10 @@ impl DbConflict {
             .get_result(conn.deref_mut())?)
     }
 
-    pub fn list(local_user: &DbLocalUser, data: &IbisData) -> MyResult<Vec<Self>> {
+    pub fn list(person: &DbPerson, data: &IbisData) -> MyResult<Vec<Self>> {
         let mut conn = data.db_pool.get()?;
         Ok(conflict::table
-            .filter(conflict::dsl::creator_id.eq(local_user.id))
+            .filter(conflict::dsl::creator_id.eq(person.id))
             .get_results(conn.deref_mut())?)
     }
 
diff --git a/src/backend/database/edit.rs b/src/backend/database/edit.rs
index 3ada16c..aae3d5c 100644
--- a/src/backend/database/edit.rs
+++ b/src/backend/database/edit.rs
@@ -4,7 +4,7 @@ use crate::{
         error::MyResult,
         IbisData,
     },
-    common::{DbArticle, DbEdit, EditVersion, EditView},
+    common::{DbArticle, DbEdit, EditVersion, EditView, PersonId},
 };
 use activitypub_federation::fetch::object_id::ObjectId;
 use chrono::{DateTime, Utc};
@@ -15,7 +15,7 @@ use std::ops::DerefMut;
 #[derive(Debug, Clone, Insertable, AsChangeset)]
 #[diesel(table_name = edit, check_for_backend(diesel::pg::Pg))]
 pub struct DbEditForm {
-    pub creator_id: i32,
+    pub creator_id: PersonId,
     pub hash: EditVersion,
     pub ap_id: ObjectId<DbEdit>,
     pub diff: String,
@@ -28,7 +28,7 @@ pub struct DbEditForm {
 impl DbEditForm {
     pub fn new(
         original_article: &DbArticle,
-        creator_id: i32,
+        creator_id: PersonId,
         updated_text: &str,
         summary: String,
         previous_version_id: EditVersion,
diff --git a/src/backend/database/schema.rs b/src/backend/database/schema.rs
index 81b43ed..727bfd0 100644
--- a/src/backend/database/schema.rs
+++ b/src/backend/database/schema.rs
@@ -102,7 +102,7 @@ diesel::table! {
 
 diesel::joinable!(article -> instance (instance_id));
 diesel::joinable!(conflict -> article (article_id));
-diesel::joinable!(conflict -> local_user (creator_id));
+diesel::joinable!(conflict -> person (creator_id));
 diesel::joinable!(edit -> article (article_id));
 diesel::joinable!(edit -> person (creator_id));
 diesel::joinable!(instance_follow -> instance (instance_id));
diff --git a/src/backend/database/user.rs b/src/backend/database/user.rs
index 13dd02c..966d09e 100644
--- a/src/backend/database/user.rs
+++ b/src/backend/database/user.rs
@@ -6,7 +6,14 @@ use crate::{
         },
         error::MyResult,
     },
-    common::{utils::http_protocol_str, DbInstance, DbLocalUser, DbPerson, LocalUserView},
+    common::{
+        utils::http_protocol_str,
+        DbInstance,
+        DbLocalUser,
+        DbPerson,
+        LocalUserView,
+        PersonId,
+    },
 };
 use activitypub_federation::{
     config::Data,
@@ -31,7 +38,7 @@ use std::ops::DerefMut;
 #[diesel(table_name = local_user, check_for_backend(diesel::pg::Pg))]
 pub struct DbLocalUserForm {
     pub password_encrypted: String,
-    pub person_id: i32,
+    pub person_id: PersonId,
     pub admin: bool,
 }
 
@@ -58,7 +65,7 @@ impl DbPerson {
             .get_result::<DbPerson>(conn.deref_mut())?)
     }
 
-    pub fn read(id: i32, data: &Data<IbisData>) -> MyResult<DbPerson> {
+    pub fn read(id: PersonId, data: &Data<IbisData>) -> MyResult<DbPerson> {
         let mut conn = data.db_pool.get()?;
         Ok(person::table.find(id).get_result(conn.deref_mut())?)
     }
@@ -155,7 +162,7 @@ impl DbPerson {
         })
     }
 
-    fn read_following(id_: i32, data: &Data<IbisData>) -> MyResult<Vec<DbInstance>> {
+    fn read_following(id_: PersonId, data: &Data<IbisData>) -> MyResult<Vec<DbInstance>> {
         use instance_follow::dsl::{follower_id, instance_id};
         let mut conn = data.db_pool.get()?;
         Ok(instance_follow::table
diff --git a/src/backend/federation/activities/mod.rs b/src/backend/federation/activities/mod.rs
index 251d546..c3614b3 100644
--- a/src/backend/federation/activities/mod.rs
+++ b/src/backend/federation/activities/mod.rs
@@ -7,7 +7,7 @@ use crate::{
             update_remote_article::UpdateRemoteArticle,
         },
     },
-    common::{DbArticle, DbEdit, DbInstance, EditVersion},
+    common::{DbArticle, DbEdit, DbInstance, EditVersion, PersonId},
 };
 use activitypub_federation::config::Data;
 use chrono::Utc;
@@ -24,7 +24,7 @@ pub async fn submit_article_update(
     summary: String,
     previous_version: EditVersion,
     original_article: &DbArticle,
-    creator_id: i32,
+    creator_id: PersonId,
     data: &Data<IbisData>,
 ) -> Result<(), Error> {
     let form = DbEditForm::new(
diff --git a/src/backend/utils.rs b/src/backend/utils.rs
index 542a2a6..3f3531e 100644
--- a/src/backend/utils.rs
+++ b/src/backend/utils.rs
@@ -46,7 +46,7 @@ pub fn generate_article_version(edits: &Vec<EditView>, version: &EditVersion) ->
 #[cfg(test)]
 mod test {
     use super::*;
-    use crate::common::{DbEdit, DbPerson};
+    use crate::common::{DbEdit, DbPerson, PersonId};
     use activitypub_federation::fetch::object_id::ObjectId;
     use chrono::Utc;
     use diffy::create_patch;
@@ -57,7 +57,7 @@ mod test {
             Ok(EditView {
                 edit: DbEdit {
                     id: 0,
-                    creator_id: 0,
+                    creator_id: PersonId(0),
                     hash: EditVersion::new(&diff),
                     ap_id: ObjectId::parse("http://example.com")?,
                     diff,
@@ -67,7 +67,7 @@ mod test {
                     created: Utc::now(),
                 },
                 creator: DbPerson {
-                    id: 0,
+                    id: PersonId(0),
                     username: "".to_string(),
                     ap_id: ObjectId::parse("http://example.com")?,
                     inbox_url: "".to_string(),
diff --git a/src/common/mod.rs b/src/common/mod.rs
index 12912ad..4734e2b 100644
--- a/src/common/mod.rs
+++ b/src/common/mod.rs
@@ -67,7 +67,7 @@ pub struct DbEdit {
     //       the same edit is used for multiple articles
     pub id: i32,
     #[serde(skip)]
-    pub creator_id: i32,
+    pub creator_id: PersonId,
     /// UUID built from sha224 hash of diff
     pub hash: EditVersion,
     #[cfg(feature = "ssr")]
@@ -150,12 +150,17 @@ pub struct DbLocalUser {
     pub admin: bool,
 }
 
+#[derive(
+    Debug, Copy, Clone, Hash, Eq, PartialEq, Default, Serialize, Deserialize, DieselNewType,
+)]
+pub struct PersonId(pub i32);
+
 /// Federation related data from a local or remote user.
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
 #[cfg_attr(feature = "ssr", derive(Queryable, Selectable, Identifiable))]
 #[cfg_attr(feature = "ssr", diesel(table_name = person, check_for_backend(diesel::pg::Pg)))]
 pub struct DbPerson {
-    pub id: i32,
+    pub id: PersonId,
     pub username: String,
     #[cfg(feature = "ssr")]
     pub ap_id: ObjectId<DbPerson>,
diff --git a/src/database/schema.rs b/src/database/schema.rs
deleted file mode 100644
index 81b43ed..0000000
--- a/src/database/schema.rs
+++ /dev/null
@@ -1,121 +0,0 @@
-// @generated automatically by Diesel CLI.
-
-diesel::table! {
-    article (id) {
-        id -> Int4,
-        title -> Text,
-        text -> Text,
-        #[max_length = 255]
-        ap_id -> Varchar,
-        instance_id -> Int4,
-        local -> Bool,
-        protected -> Bool,
-    }
-}
-
-diesel::table! {
-    conflict (id) {
-        id -> Int4,
-        hash -> Uuid,
-        diff -> Text,
-        summary -> Text,
-        creator_id -> Int4,
-        article_id -> Int4,
-        previous_version_id -> Uuid,
-    }
-}
-
-diesel::table! {
-    edit (id) {
-        id -> Int4,
-        creator_id -> Int4,
-        hash -> Uuid,
-        #[max_length = 255]
-        ap_id -> Varchar,
-        diff -> Text,
-        summary -> Text,
-        article_id -> Int4,
-        previous_version_id -> Uuid,
-        created -> Timestamptz,
-    }
-}
-
-diesel::table! {
-    instance (id) {
-        id -> Int4,
-        domain -> Text,
-        #[max_length = 255]
-        ap_id -> Varchar,
-        description -> Nullable<Text>,
-        #[max_length = 255]
-        articles_url -> Nullable<Varchar>,
-        #[max_length = 255]
-        inbox_url -> Varchar,
-        public_key -> Text,
-        private_key -> Nullable<Text>,
-        last_refreshed_at -> Timestamptz,
-        local -> Bool,
-        #[max_length = 255]
-        instances_url -> Nullable<Varchar>,
-    }
-}
-
-diesel::table! {
-    instance_follow (id) {
-        id -> Int4,
-        instance_id -> Int4,
-        follower_id -> Int4,
-        pending -> Bool,
-    }
-}
-
-diesel::table! {
-    jwt_secret (id) {
-        id -> Int4,
-        secret -> Varchar,
-    }
-}
-
-diesel::table! {
-    local_user (id) {
-        id -> Int4,
-        password_encrypted -> Text,
-        person_id -> Int4,
-        admin -> Bool,
-    }
-}
-
-diesel::table! {
-    person (id) {
-        id -> Int4,
-        username -> Text,
-        #[max_length = 255]
-        ap_id -> Varchar,
-        #[max_length = 255]
-        inbox_url -> Varchar,
-        public_key -> Text,
-        private_key -> Nullable<Text>,
-        last_refreshed_at -> Timestamptz,
-        local -> Bool,
-    }
-}
-
-diesel::joinable!(article -> instance (instance_id));
-diesel::joinable!(conflict -> article (article_id));
-diesel::joinable!(conflict -> local_user (creator_id));
-diesel::joinable!(edit -> article (article_id));
-diesel::joinable!(edit -> person (creator_id));
-diesel::joinable!(instance_follow -> instance (instance_id));
-diesel::joinable!(instance_follow -> person (follower_id));
-diesel::joinable!(local_user -> person (person_id));
-
-diesel::allow_tables_to_appear_in_same_query!(
-    article,
-    conflict,
-    edit,
-    instance,
-    instance_follow,
-    jwt_secret,
-    local_user,
-    person,
-);
diff --git a/src/lib.rs b/src/lib.rs
index d24c3dc..0edc1ce 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,6 @@
+#[macro_use]
+extern crate diesel_derive_newtype;
+
 #[cfg(feature = "ssr")]
 pub mod backend;
 pub mod common;
diff --git a/tests/test.rs b/tests/test.rs
index adacdf3..f9f3368 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -358,6 +358,7 @@ async fn test_local_edit_conflict() -> MyResult<()> {
         previous_version_id: create_res.latest_version.clone(),
         resolve_conflict_id: None,
     };
+    dbg!("first edit");
     let edit_res = data.alpha.edit_article(&edit_form).await?;
     assert_eq!(edit_res.article.text, edit_form.new_text);
     assert_eq!(2, edit_res.edits.len());
@@ -370,6 +371,7 @@ async fn test_local_edit_conflict() -> MyResult<()> {
         previous_version_id: create_res.latest_version,
         resolve_conflict_id: None,
     };
+    dbg!("second edit");
     let edit_res = data
         .alpha
         .edit_article_with_conflict(&edit_form)