diff --git a/lib/archethic_web/controllers/api/transaction_controller.ex b/lib/archethic_web/controllers/api/transaction_controller.ex
index 9d6a1c41f4..ef1f1552c8 100644
--- a/lib/archethic_web/controllers/api/transaction_controller.ex
+++ b/lib/archethic_web/controllers/api/transaction_controller.ex
@@ -197,11 +197,6 @@ defmodule ArchethicWeb.API.TransactionController do
   defp fetch_recipient_tx_and_simulate(recipient, tx) do
     case Archethic.search_transaction(recipient) do
       {:ok, prev_tx} ->
-        prev_tx =
-          prev_tx
-          |> TransactionPayload.to_map()
-          |> Transaction.cast()
-
         Archethic.simulate_contract_execution(prev_tx, tx)
 
       {:error, reason} ->
diff --git a/test/archethic_web/controllers/api/transaction_controller_test.exs b/test/archethic_web/controllers/api/transaction_controller_test.exs
index fb3fcaa38a..80aa46d461 100644
--- a/test/archethic_web/controllers/api/transaction_controller_test.exs
+++ b/test/archethic_web/controllers/api/transaction_controller_test.exs
@@ -265,7 +265,7 @@ defmodule ArchethicWeb.API.TransactionControllerTest do
       code = """
       condition inherit: [
         type: transfer,
-        content: \"hello\",
+        content: "hello",
         uco_transfers: true
       ]
 
@@ -355,7 +355,7 @@ defmodule ArchethicWeb.API.TransactionControllerTest do
         "address" => "00009e059e8171643b959284fe542909f3b32198b8fc25b3e50447589b84341c1d67",
         "data" => %{
           "code" => code,
-          "content" => "0000",
+          "content" => "hello",
           "recipients" => ["00009e059e8171643b959284fe542909f3b32198b8fc25b3e50447589b84341c1d67"]
         },
         "originSignature" =>