diff --git a/priv/repo/migrations/20260501183033_rename_agent_assignments_unique_index.exs b/priv/repo/migrations/20260501183033_rename_agent_assignments_unique_index.exs
new file mode 100644
index 00000000..3912b1a1
--- /dev/null
+++ b/priv/repo/migrations/20260501183033_rename_agent_assignments_unique_index.exs
@@ -0,0 +1,17 @@
+defmodule Towerops.Repo.Migrations.RenameAgentAssignmentsUniqueIndex do
+  use Ecto.Migration
+
+  def up do
+    execute """
+    ALTER INDEX IF EXISTS agent_assignments_equipment_id_index
+    RENAME TO agent_assignments_device_id_index
+    """
+  end
+
+  def down do
+    execute """
+    ALTER INDEX IF EXISTS agent_assignments_device_id_index
+    RENAME TO agent_assignments_equipment_id_index
+    """
+  end
+end