diff --git a/upub/core/src/model/like.rs b/upub/core/src/model/like.rs
index c92f2b8..e8f1233 100644
--- a/upub/core/src/model/like.rs
+++ b/upub/core/src/model/like.rs
@@ -7,20 +7,11 @@ pub struct Model {
 	pub internal: i64,
 	pub actor: i64,
 	pub object: i64,
-	pub activity: i64,
 	pub published: ChronoDateTimeUtc,
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
 pub enum Relation {
-	#[sea_orm(
-		belongs_to = "super::activity::Entity",
-		from = "Column::Activity",
-		to = "super::activity::Column::Internal",
-		on_update = "Cascade",
-		on_delete = "Cascade"
-	)]
-	Activities,
 	#[sea_orm(
 		belongs_to = "super::actor::Entity",
 		from = "Column::Actor",
@@ -39,12 +30,6 @@ pub enum Relation {
 	Objects,
 }
 
-impl Related<super::activity::Entity> for Entity {
-	fn to() -> RelationDef {
-		Relation::Activities.def()
-	}
-}
-
 impl Related<super::actor::Entity> for Entity {
 	fn to() -> RelationDef {
 		Relation::Actors.def()
diff --git a/upub/migrations/src/lib.rs b/upub/migrations/src/lib.rs
index fe3fc45..4b3c101 100644
--- a/upub/migrations/src/lib.rs
+++ b/upub/migrations/src/lib.rs
@@ -8,6 +8,7 @@ mod m20240524_000005_create_attachments_tags_mentions;
 mod m20240529_000001_add_relation_unique_index;
 mod m20240605_000001_add_jobs_table;
 mod m20240606_000001_add_audience_to_objects;
+mod m20240607_000001_activity_ref_is_optional;
 
 pub struct Migrator;
 
@@ -23,6 +24,7 @@ impl MigratorTrait for Migrator {
 			Box::new(m20240529_000001_add_relation_unique_index::Migration),
 			Box::new(m20240605_000001_add_jobs_table::Migration),
 			Box::new(m20240606_000001_add_audience_to_objects::Migration),
+			Box::new(m20240607_000001_activity_ref_is_optional::Migration),
 		]
 	}
 }
diff --git a/upub/migrations/src/m20240524_000002_create_relations_likes_shares.rs b/upub/migrations/src/m20240524_000002_create_relations_likes_shares.rs
index 7c058f8..6c6b058 100644
--- a/upub/migrations/src/m20240524_000002_create_relations_likes_shares.rs
+++ b/upub/migrations/src/m20240524_000002_create_relations_likes_shares.rs
@@ -19,7 +19,7 @@ pub enum Likes {
 	Internal,
 	Actor,
 	Object,
-	Activity,
+	Activity, // DROPPED
 	Published,
 }
 
diff --git a/upub/migrations/src/m20240607_000001_activity_ref_is_optional.rs b/upub/migrations/src/m20240607_000001_activity_ref_is_optional.rs
new file mode 100644
index 0000000..347a7a2
--- /dev/null
+++ b/upub/migrations/src/m20240607_000001_activity_ref_is_optional.rs
@@ -0,0 +1,51 @@
+use sea_orm_migration::prelude::*;
+
+use crate::m20240524_000002_create_relations_likes_shares::{Announces, Likes};
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+	async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+
+		manager
+			.alter_table(
+				Table::alter()
+					.table(Likes::Table)
+					.drop_column(Likes::Activity)
+					.to_owned()
+			)
+			.await?;
+
+		manager
+			.create_index(
+				Index::create()
+					.name("index-announces-actor-object")
+					.table(Announces::Table)
+					.col(Announces::Actor)
+					.col(Announces::Object)
+					.to_owned()
+			).await?;
+
+		Ok(())
+	}
+
+	async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+
+		manager
+			.alter_table(
+				Table::alter()
+					.table(Likes::Table)
+					.add_column(ColumnDef::new(Likes::Activity).big_integer().not_null())
+					.to_owned()
+			)
+			.await?;
+
+		manager
+			.drop_index(Index::drop().name("index-announces-actor-object").table(Announces::Table).to_owned())
+			.await?;
+
+		Ok(())
+	}
+}