diff --git a/packages/backend/server/migrations/20231124091123_soft_delete_opt_blobs/migration.sql b/packages/backend/server/migrations/20231124091123_soft_delete_opt_blobs/migration.sql
new file mode 100644
index 0000000000000..6e107ce0722b2
--- /dev/null
+++ b/packages/backend/server/migrations/20231124091123_soft_delete_opt_blobs/migration.sql
@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "optimized_blobs" ADD COLUMN     "deleted_at" TIMESTAMPTZ(6);
diff --git a/packages/backend/server/schema.prisma b/packages/backend/server/schema.prisma
index a35a4187d20cd..640ad71c4a4a6 100644
--- a/packages/backend/server/schema.prisma
+++ b/packages/backend/server/schema.prisma
@@ -178,13 +178,15 @@ model Blob {
 }
 
 model OptimizedBlob {
-  id          Int      @id @default(autoincrement()) @db.Integer
-  hash        String   @db.VarChar
-  workspaceId String   @map("workspace_id") @db.VarChar
-  params      String   @db.VarChar
-  blob        Bytes    @db.ByteA
+  id          Int       @id @default(autoincrement()) @db.Integer
+  hash        String    @db.VarChar
+  workspaceId String    @map("workspace_id") @db.VarChar
+  params      String    @db.VarChar
+  blob        Bytes     @db.ByteA
   length      BigInt
-  createdAt   DateTime @default(now()) @map("created_at") @db.Timestamptz(6)
+  createdAt   DateTime  @default(now()) @map("created_at") @db.Timestamptz(6)
+  // not for keeping, but for snapshot history
+  deletedAt   DateTime? @map("deleted_at") @db.Timestamptz(6)
 
   @@unique([workspaceId, hash, params])
   @@map("optimized_blobs")