diff --git a/01.workspace/heave/src/fun/sqlite_load_by_class.rs b/01.workspace/heave/src/fun/sqlite_load_by_class.rs
index 6426565..5a9d4ff 100644
--- a/01.workspace/heave/src/fun/sqlite_load_by_class.rs
+++ b/01.workspace/heave/src/fun/sqlite_load_by_class.rs
@@ -16,6 +16,7 @@ pub fn run(path: &path::Path, entity_class: &str) -> Vec<Entity> {
     for entity in result {
         let mut entity = entity.unwrap();
         sqlite::load::attributes(&connection, &mut entity);
+        entity.state = EntityState::Loaded;
         entities.push(entity);
     }
     entities
diff --git a/01.workspace/heave/src/fun/sqlite_load_by_id.rs b/01.workspace/heave/src/fun/sqlite_load_by_id.rs
index 2a908f2..17fb1a1 100644
--- a/01.workspace/heave/src/fun/sqlite_load_by_id.rs
+++ b/01.workspace/heave/src/fun/sqlite_load_by_id.rs
@@ -14,6 +14,7 @@ pub fn run(path: &path::Path, entity_id: &str) -> Option<Entity> {
     let mut entity = result.unwrap();
     if let Some(ref mut entity) = entity {
         sqlite::load::attributes(&connection, entity);
+        entity.state = EntityState::Loaded;
     }
     entity
 }
diff --git a/01.workspace/heave/src/fun/sqlite_persist_catalog.rs b/01.workspace/heave/src/fun/sqlite_persist_catalog.rs
index ca1d562..6d2754b 100644
--- a/01.workspace/heave/src/fun/sqlite_persist_catalog.rs
+++ b/01.workspace/heave/src/fun/sqlite_persist_catalog.rs
@@ -37,6 +37,7 @@ fn write_attribute(attribute: &Attribute, entity: &Entity, transaction: &rusqlit
 fn write_entity(entity: &Entity, transaction: &rusqlite::Transaction) {
     let entity_id = [&entity.id];
     let entity_values = (&entity.id, &entity.class);
+    println!("Writing: {:?}", entity_values);
     let _ = transaction.execute(DELETE_ENTITY_STATEMENT, entity_id);
     let _ = transaction.execute(INSERT_ENTITY_STATEMENT, entity_values);
     for (_key, attribute) in entity.attributes.iter() {
@@ -47,7 +48,11 @@ fn write_entity(entity: &Entity, transaction: &rusqlite::Transaction) {
 pub fn run(path: &path::Path, catalog: &Catalog) {
     let mut connection = Connection::open(path).unwrap();
     let transaction = connection.transaction().unwrap();
-    for (_key, entity) in catalog.items.iter() {
+    for (_key, entity) in catalog
+        .items
+        .iter()
+        .filter(|item| item.1.state == EntityState::New)
+    {
         write_entity(entity, &transaction);
     }
     let _ = transaction.commit();
diff --git a/01.workspace/heave/src/lib.rs b/01.workspace/heave/src/lib.rs
index 2389bdc..35a3975 100644
--- a/01.workspace/heave/src/lib.rs
+++ b/01.workspace/heave/src/lib.rs
@@ -10,6 +10,7 @@ mod tst;
 pub use crate::str::attribute::O as Attribute;
 pub use crate::str::catalog::O as Catalog;
 pub use crate::str::entity::O as Entity;
+pub use crate::str::entity_state::E as EntityState;
 pub use crate::str::value::E as Value;
 pub use crate::trt::eav::T as EAV;
 
diff --git a/01.workspace/heave/src/str/catalog.rs b/01.workspace/heave/src/str/catalog.rs
index ebf18c1..9005c4e 100644
--- a/01.workspace/heave/src/str/catalog.rs
+++ b/01.workspace/heave/src/str/catalog.rs
@@ -18,12 +18,14 @@ impl O {
         sqlite::init::db(path);
     }
     pub fn insert(&mut self, object: impl EAV) {
-        let entity = object.into();
+        let mut entity = object.into();
+        entity.state = EntityState::New;
         self.items.insert(entity.id.clone(), entity);
     }
     pub fn insert_many(&mut self, objects: Vec<impl EAV>) {
         for object in objects {
-            let entity = object.into();
+            let mut entity = object.into();
+            entity.state = EntityState::New;
             self.items.insert(entity.id.clone(), entity);
         }
     }
diff --git a/01.workspace/heave/src/str/entity.rs b/01.workspace/heave/src/str/entity.rs
index a591282..30e0ebf 100644
--- a/01.workspace/heave/src/str/entity.rs
+++ b/01.workspace/heave/src/str/entity.rs
@@ -3,6 +3,7 @@ use crate::*;
 #[derive(Debug, Default, PartialEq, Clone)]
 pub struct O {
     pub id: String,
+    pub state: EntityState,
     pub class: String,
     pub attributes: std::collections::HashMap<String, Attribute>,
 }
diff --git a/01.workspace/heave/src/str/entity_state.rs b/01.workspace/heave/src/str/entity_state.rs
new file mode 100644
index 0000000..e3bbeb5
--- /dev/null
+++ b/01.workspace/heave/src/str/entity_state.rs
@@ -0,0 +1,6 @@
+#[derive(Debug, Default, PartialEq, PartialOrd, Eq, Ord, Clone, Copy, Hash)]
+pub enum E {
+    #[default]
+    New,
+    Loaded,
+}
diff --git a/01.workspace/heave/src/str/mod.rs b/01.workspace/heave/src/str/mod.rs
index d11628e..1a1a6e5 100644
--- a/01.workspace/heave/src/str/mod.rs
+++ b/01.workspace/heave/src/str/mod.rs
@@ -1,4 +1,5 @@
 pub mod attribute;
 pub mod catalog;
 pub mod entity;
+pub mod entity_state;
 pub mod value;