diff --git a/apps/explorer/lib/explorer/chain/transaction_actions.ex b/apps/explorer/lib/explorer/chain/transaction_actions.ex
index 42593b9f0f..fa0c7aa273 100644
--- a/apps/explorer/lib/explorer/chain/transaction_actions.ex
+++ b/apps/explorer/lib/explorer/chain/transaction_actions.ex
@@ -26,6 +26,7 @@ defmodule Explorer.Chain.TransactionActions do
           log_index: non_neg_integer()
         }
 
+  @primary_key false
   schema "transaction_actions" do
     field(:protocol, Ecto.Enum, values: @supported_protocols)
     field(:data, :map)
@@ -49,9 +50,9 @@ defmodule Explorer.Chain.TransactionActions do
       ]
     )
 
-    field(:log_index, :integer)
+    field(:log_index, :integer, primary_key: true)
 
-    belongs_to(:transaction, Transaction, foreign_key: :hash, references: :hash, type: Hash.Full)
+    belongs_to(:transaction, Transaction, foreign_key: :hash, primary_key: true, references: :hash, type: Hash.Full)
 
     timestamps()
   end
diff --git a/apps/explorer/priv/repo/migrations/20221104091552_add_transaction_actions_table.exs b/apps/explorer/priv/repo/migrations/20221104091552_add_transaction_actions_table.exs
index 845fd381c6..90d172cea5 100644
--- a/apps/explorer/priv/repo/migrations/20221104091552_add_transaction_actions_table.exs
+++ b/apps/explorer/priv/repo/migrations/20221104091552_add_transaction_actions_table.exs
@@ -12,15 +12,16 @@ defmodule Explorer.Repo.Migrations.AddTransactionActionsTable do
       "DROP TYPE transaction_actions_type"
     )
 
-    create table(:transaction_actions) do
+    create table(:transaction_actions, primary_key: false) do
       add(:hash, references(:transactions, column: :hash, on_delete: :delete_all, on_update: :update_all, type: :bytea),
-        null: false
+        null: false,
+        primary_key: true
       )
 
       add(:protocol, :transaction_actions_protocol, null: false)
       add(:data, :map, default: %{}, null: false)
       add(:type, :transaction_actions_type, null: false)
-      add(:log_index, :integer, null: false)
+      add(:log_index, :integer, null: false, primary_key: true)
 
       timestamps(null: false, type: :utc_datetime_usec)
     end