diff --git a/lib/archethic/transaction_chain/transaction/validation_stamp/ledger_operations.ex b/lib/archethic/transaction_chain/transaction/validation_stamp/ledger_operations.ex
index 6652691cc..595c791cd 100644
--- a/lib/archethic/transaction_chain/transaction/validation_stamp/ledger_operations.ex
+++ b/lib/archethic/transaction_chain/transaction/validation_stamp/ledger_operations.ex
@@ -390,8 +390,6 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
       # Unspent output amount (2 UCO)
       0, 0, 0, 0, 11, 235, 194, 0,
       # Unspent output type (UCO)
-      0,
-      # Unspent output reward?
       0
       >>
   """
@@ -422,7 +420,7 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
       ...> 0, 0, 0, 0, 60, 203, 247, 0, 0,
       ...> 1, 0, 0, 34, 118, 242, 194, 93, 131, 130, 195, 9, 97, 237,
       ...> 220, 195, 112, 1, 54, 221, 86, 154, 234, 96, 217, 149, 84, 188, 63, 242, 166, 47, 158, 139, 207,
-      ...> 0, 0, 0, 0, 11, 235, 194, 0, 0, 0>>
+      ...> 0, 0, 0, 0, 11, 235, 194, 0, 0>>
       ...> |> LedgerOperations.deserialize()
       {
         %LedgerOperations{
@@ -440,8 +438,7 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
               from: <<0, 0, 34, 118, 242, 194, 93, 131, 130, 195, 9, 97, 237, 220, 195, 112, 1, 54, 221,
                 86, 154, 234, 96, 217, 149, 84, 188, 63, 242, 166, 47, 158, 139, 207>>,
               amount: 200_000_000,
-              type: :UCO,
-              reward?: false
+              type: :UCO
             }
           ]
         },
diff --git a/lib/archethic/transaction_chain/transaction/validation_stamp/ledger_operations/unspent_output.ex b/lib/archethic/transaction_chain/transaction/validation_stamp/ledger_operations/unspent_output.ex
index 74ecb12b5..87a2609fe 100644
--- a/lib/archethic/transaction_chain/transaction/validation_stamp/ledger_operations/unspent_output.ex
+++ b/lib/archethic/transaction_chain/transaction/validation_stamp/ledger_operations/unspent_output.ex
@@ -14,8 +14,7 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
   @type t :: %__MODULE__{
           amount: non_neg_integer(),
           from: Crypto.versioned_hash(),
-          type: TransactionMovementType.t(),
-          reward?: boolean()
+          type: TransactionMovementType.t()
         }
 
   @doc """
@@ -39,8 +38,6 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
       # Amount
       0, 0, 0, 0, 62, 149, 186, 128,
       # UCO Unspent Output
-      0,
-      # Reward?
       0
       >>
 
@@ -64,16 +61,12 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
       1,
       # NFT address
       0, 49, 101, 72, 154, 152, 3, 174, 47, 2, 35, 7, 92, 122, 206, 185, 71, 140, 74,
-      197, 46, 99, 117, 89, 96, 100, 20, 0, 34, 181, 215, 143, 175,
-      # Reward?
-      0
+      197, 46, 99, 117, 89, 96, 100, 20, 0, 34, 181, 215, 143, 175
       >>
   """
   @spec serialize(__MODULE__.t()) :: <<_::64, _::_*8>>
-  def serialize(%__MODULE__{from: from, amount: amount, type: type, reward?: reward?}) do
-    reward_bit = if reward?, do: 1, else: 0
-
-    <<from::binary, amount::64, TransactionMovementType.serialize(type)::binary, reward_bit::8>>
+  def serialize(%__MODULE__{from: from, amount: amount, type: type}) do
+    <<from::binary, amount::64, TransactionMovementType.serialize(type)::binary>>
   end
 
   @doc """
@@ -83,15 +76,14 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
 
       iex> <<0, 0, 214, 107, 17, 107, 227, 11, 17, 43, 204, 48, 78, 129, 145, 126, 45, 68, 194,
       ...> 159, 19, 92, 240, 29, 37, 105, 183, 232, 56, 42, 163, 236, 251, 186,
-      ...> 0, 0, 0, 0, 62, 149, 186, 128, 0, 0>>
+      ...> 0, 0, 0, 0, 62, 149, 186, 128, 0>>
       ...> |> UnspentOutput.deserialize()
       {
         %UnspentOutput{
           from: <<0, 0, 214, 107, 17, 107, 227, 11, 17, 43, 204, 48, 78, 129, 145, 126, 45, 68, 194,
             159, 19, 92, 240, 29, 37, 105, 183, 232, 56, 42, 163, 236, 251, 186>>,
           amount: 1_050_000_000,
-          type: :UCO,
-          reward?: false
+          type: :UCO
         },
         ""
       }
@@ -99,7 +91,7 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
       iex> <<0, 0, 214, 107, 17, 107, 227, 11, 17, 43, 204, 48, 78, 129, 145, 126, 45, 68, 194,
       ...> 159, 19, 92, 240, 29, 37, 105, 183, 232, 56, 42, 163, 236, 251, 186,
       ...> 0, 0, 0, 0, 62, 149, 186, 128, 1, 0, 0, 49, 101, 72, 154, 152, 3, 174, 47, 2, 35, 7, 92, 122, 206, 185, 71, 140, 74,
-      ...> 197, 46, 99, 117, 89, 96, 100, 20, 0, 34, 181, 215, 143, 175, 0
+      ...> 197, 46, 99, 117, 89, 96, 100, 20, 0, 34, 181, 215, 143, 175
       ...> >>
       ...> |> UnspentOutput.deserialize()
       {
@@ -108,8 +100,7 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
             159, 19, 92, 240, 29, 37, 105, 183, 232, 56, 42, 163, 236, 251, 186>>,
           amount: 1_050_000_000,
           type: {:NFT, <<0, 0, 49, 101, 72, 154, 152, 3, 174, 47, 2, 35, 7, 92, 122, 206, 185, 71, 140, 74,
-            197, 46, 99, 117, 89, 96, 100, 20, 0, 34, 181, 215, 143, 175>>},
-          reward?: false
+            197, 46, 99, 117, 89, 96, 100, 20, 0, 34, 181, 215, 143, 175>>}
         },
         ""
       }
@@ -117,16 +108,13 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
   @spec deserialize(bitstring()) :: {__MODULE__.t(), bitstring}
   def deserialize(data) when is_bitstring(data) do
     {address, <<amount::64, rest::bitstring>>} = Utils.deserialize_address(data)
-    {type, <<reward_bit::8, rest::bitstring>>} = TransactionMovementType.deserialize(rest)
-
-    reward? = if reward_bit == 1, do: true, else: false
+    {type, rest} = TransactionMovementType.deserialize(rest)
 
     {
       %__MODULE__{
         from: address,
         amount: amount,
-        type: type,
-        reward?: reward?
+        type: type
       },
       rest
     }
@@ -136,8 +124,7 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
   def from_map(unspent_output = %{}) do
     res = %__MODULE__{
       from: Map.get(unspent_output, :from),
-      amount: Map.get(unspent_output, :amount),
-      reward?: Map.get(unspent_output, :reward)
+      amount: Map.get(unspent_output, :amount)
     }
 
     case Map.get(unspent_output, :type) do
@@ -150,12 +137,11 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
   end
 
   @spec to_map(t()) :: map()
-  def to_map(%__MODULE__{from: from, amount: amount, type: :UCO, reward?: reward?}) do
+  def to_map(%__MODULE__{from: from, amount: amount, type: :UCO}) do
     %{
       from: from,
       amount: amount,
-      type: "UCO",
-      reward: reward?
+      type: "UCO"
     }
   end
 
@@ -164,8 +150,7 @@ defmodule ArchEthic.TransactionChain.Transaction.ValidationStamp.LedgerOperation
       from: from,
       amount: amount,
       type: "NFT",
-      nft_address: nft_address,
-      reward: false
+      nft_address: nft_address
     }
   end
 end
diff --git a/priv/migrations/2_create_validation_stamp_type.cql b/priv/migrations/2_create_validation_stamp_type.cql
index 7ef7f8c2a..1826eb776 100644
--- a/priv/migrations/2_create_validation_stamp_type.cql
+++ b/priv/migrations/2_create_validation_stamp_type.cql
@@ -9,8 +9,7 @@ CREATE TYPE IF NOT EXISTS archethic.ledger_operations_unspent_output(
   "from" blob,
   amount bigint,
   type varchar,
-  nft_address blob,
-  reward boolean
+  nft_address blob
 );
 
 CREATE TYPE IF NOT EXISTS archethic.ledger_operations(