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diff --git a/priv/repo/migrations/20170522160642_case_insensivtivity.exs b/priv/repo/migrations/20170522160642_case_insensivtivity.exs
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Repo.Migrations.CaseInsensivtivity do
+  use Ecto.Migration
+
+  # Two-steps alters are intentional.
+  # When alter of 2 columns is done in a single operation,
+  # inconsistent failures happen because of index on `email` column.
+
+  def up do
+    execute("create extension if not exists citext")
+
+    alter table(:users) do
+      modify(:email, :citext)
+    end
+
+    alter table(:users) do
+      modify(:nickname, :citext)
+    end
+  end
+
+  def down do
+    alter table(:users) do
+      modify(:email, :string)
+    end
+
+    alter table(:users) do
+      modify(:nickname, :string)
+    end
+
+    execute("drop extension if exists citext")
+  end
+end