diff --git a/lib/archethic/crypto/keystore/shared_secrets/software_impl.ex b/lib/archethic/crypto/keystore/shared_secrets/software_impl.ex
index 1e4f401a6..d424d8496 100644
--- a/lib/archethic/crypto/keystore/shared_secrets/software_impl.ex
+++ b/lib/archethic/crypto/keystore/shared_secrets/software_impl.ex
@@ -58,23 +58,6 @@ defmodule Archethic.Crypto.SharedSecretsKeystore.SoftwareImpl do
   end
 
   @impl GenServer
-  def code_change(1, state, _extra) do
-    [reward_sign_fun] = :ets.take(@keystore_table, :network_pool_sign_fun)
-    [reward_public_key_fun] = :ets.take(@keystore_table, :network_pool_public_key_fun)
-    [reward_seed_wrap_fun] = :ets.take(@keystore_table, :network_pool_seed_wrap_fun)
-
-    :ets.insert(@keystore_table, {:reward_sign_fun, reward_sign_fun})
-    :ets.insert(@keystore_table, {:reward_public_key_fun, reward_public_key_fun})
-    :ets.insert(@keystore_table, {:reward_seed_wrap_fun, reward_seed_wrap_fun})
-
-    :node_shared_secrets
-    |> TransactionChain.list_addresses_by_type()
-    |> Stream.take(-2)
-    |> Enum.each(&load_node_shared_secrets_tx/1)
-
-    {:ok, state}
-  end
-
   # we store functions in the ETS table, so we need to reload them
   # every upgrade to avoid: "xxx is invalid, likely because it points to an old version of the code"
   def code_change(_, state, _extra) do
diff --git a/lib/archethic/mining/distributed_workflow.ex b/lib/archethic/mining/distributed_workflow.ex
index 7dcf63dee..9a2cf479a 100644
--- a/lib/archethic/mining/distributed_workflow.ex
+++ b/lib/archethic/mining/distributed_workflow.ex
@@ -1036,11 +1036,6 @@ defmodule Archethic.Mining.DistributedWorkflow do
     {:keep_state_and_data, :postpone}
   end
 
-  def code_change(1, state, data, _extra) do
-    data = data |> Map.update!(:context, &Map.put(&1, :mining_error, nil))
-    {:ok, state, data}
-  end
-
   def code_change(_old_vsn, state, data, _extra), do: {:ok, state, data}
 
   defp notify_transaction_context(
diff --git a/lib/archethic/shared_secrets/mem_tables/network_lookup.ex b/lib/archethic/shared_secrets/mem_tables/network_lookup.ex
index 669aa18a3..31af7853b 100644
--- a/lib/archethic/shared_secrets/mem_tables/network_lookup.ex
+++ b/lib/archethic/shared_secrets/mem_tables/network_lookup.ex
@@ -116,10 +116,5 @@ defmodule Archethic.SharedSecrets.MemTables.NetworkLookup do
     public_key
   end
 
-  def code_change(1, state, _extra) do
-    :ets.delete(@table_name, :network_pool_address)
-    {:ok, state}
-  end
-
   def code_change(_, state, _extra), do: {:ok, state}
 end
diff --git a/mix.exs b/mix.exs
index 5c9993b14..9c7676bf5 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule Archethic.MixProject do
   def project do
     [
       app: :archethic,
-      version: "1.5.1",
+      version: "1.5.2",
       build_path: "_build",
       config_path: "config/config.exs",
       deps_path: "deps",