diff --git a/lib/decentralised_book_index/sync/sync/author_sync.ex b/lib/decentralised_book_index/sync/sync/author_sync.ex
index dfc7737..ab5dd19 100644
--- a/lib/decentralised_book_index/sync/sync/author_sync.ex
+++ b/lib/decentralised_book_index/sync/sync/author_sync.ex
@@ -9,6 +9,7 @@ defmodule DecentralisedBookIndex.Sync.AuthorSync do
           attrs
           |> Map.delete(:id)
           |> Map.delete(:author_alias_registry_id)
+          |> Map.put(:dbi_server_id, server_id)
 
         author
         |> Ash.Changeset.for_update(:sync, attrs)
diff --git a/lib/decentralised_book_index/sync/sync/publisher_sync.ex b/lib/decentralised_book_index/sync/sync/publisher_sync.ex
index 41d22dc..f06bf9e 100644
--- a/lib/decentralised_book_index/sync/sync/publisher_sync.ex
+++ b/lib/decentralised_book_index/sync/sync/publisher_sync.ex
@@ -8,6 +8,7 @@ defmodule DecentralisedBookIndex.Sync.PublisherSync do
         attrs =
           attrs
           |> Map.delete(:id)
+          |> Map.put(:dbi_server_id, server_id)
 
         publisher
         |> Ash.Changeset.for_update(:sync, attrs)
diff --git a/lib/decentralised_book_index/sync/sync_tasks/sync_authors_task.ex b/lib/decentralised_book_index/sync/sync_tasks/sync_authors_task.ex
index 0e6e182..f814a9c 100644
--- a/lib/decentralised_book_index/sync/sync_tasks/sync_authors_task.ex
+++ b/lib/decentralised_book_index/sync/sync_tasks/sync_authors_task.ex
@@ -5,6 +5,8 @@ defmodule DecentralisedBookIndex.SyncTasks.SyncAuthorsTask do
 
   alias DecentralisedBookIndex.Metadata.DBIServer
 
+  require Logger
+
   def sync(%DBIServer{} = server) do
     url = "#{server.url}/api/v1/json/authors"
     FetchJsons.get(url, sync_author_closure(server))
diff --git a/lib/decentralised_book_index/sync/sync_tasks/sync_publishers_task.ex b/lib/decentralised_book_index/sync/sync_tasks/sync_publishers_task.ex
index b63f9e4..9a50b22 100644
--- a/lib/decentralised_book_index/sync/sync_tasks/sync_publishers_task.ex
+++ b/lib/decentralised_book_index/sync/sync_tasks/sync_publishers_task.ex
@@ -5,6 +5,8 @@ defmodule DecentralisedBookIndex.SyncTasks.SyncPublishersTask do
 
   alias DecentralisedBookIndex.Metadata.DBIServer
 
+  require Logger
+
   def sync(%DBIServer{} = server) do
     url = "#{server.url}/api/v1/json/publishers"
     FetchJsons.get(url, sync_closure(server))
diff --git a/test/decentralised_book_index/sync/sync/author_sync_test.exs b/test/decentralised_book_index/sync/sync/author_sync_test.exs
index 3f9d072..9277cf2 100644
--- a/test/decentralised_book_index/sync/sync/author_sync_test.exs
+++ b/test/decentralised_book_index/sync/sync/author_sync_test.exs
@@ -16,15 +16,23 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorSyncTest do
         name: "Author",
         description: "Something",
         avatar_url: "/images/avatar.png",
-        author_alias_registry_id: nil
+        author_alias_registry_id: nil,
+        inserted_at: "2025-03-21T09:20:48.791539Z",
+        updated_at: "2025-03-21T09:20:48.791539Z"
       }
 
+      {:ok, inserted_at, 0} = DateTime.from_iso8601(author[:inserted_at])
+      {:ok, updated_at, 0} = DateTime.from_iso8601(author[:updated_at])
+
       assert :ok = AuthorSync.create_update(author, server.id)
       assert {:ok, saved_author} = Metadata.get_author_by_id(author.id)
 
-      assert author.id == saved_author.id
-      assert author.name == saved_author.name
-      assert author.avatar_url == saved_author.avatar_url
+      author =
+        author
+        |> Map.replace(:inserted_at, inserted_at)
+        |> Map.replace(:updated_at, updated_at)
+
+      assert author = saved_author
       assert nil != saved_author.author_alias_registry_id
       assert server.id == saved_author.dbi_server_id
     end
@@ -45,10 +53,7 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.AuthorSyncTest do
       assert :ok = AuthorSync.create_update(author_attrs, server.id)
       assert {:ok, saved_author} = Metadata.get_author_by_id(author.id)
 
-      assert author.id == saved_author.id
-      assert author_attrs.name == saved_author.name
-      assert author_attrs.description == saved_author.description
-      assert author_attrs.avatar_url == saved_author.avatar_url
+      assert author = saved_author
     end
   end
 end
diff --git a/test/decentralised_book_index/sync/sync/publisher_sync_test.exs b/test/decentralised_book_index/sync/sync/publisher_sync_test.exs
index ce2832d..29c82c0 100644
--- a/test/decentralised_book_index/sync/sync/publisher_sync_test.exs
+++ b/test/decentralised_book_index/sync/sync/publisher_sync_test.exs
@@ -30,6 +30,7 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.PublisherSyncTest do
         |> Map.replace(:updated_at, updated_at)
 
       assert publisher = saved_publisher
+      assert server.id == saved_publisher.dbi_server_id
     end
 
     test "update an existing publisher" do
@@ -48,6 +49,7 @@ defmodule DecentralisedBookIndex.Sync.DataTransformers.PublisherSyncTest do
       assert {:ok, saved_publisher} = Metadata.get_publisher_by_id(publisher.id)
 
       assert publisher_attrs = saved_publisher
+      assert server.id == saved_publisher.dbi_server_id
     end
   end
 end