diff --git a/db/migrate/20240806144333_create_remote_identities.rb b/db/migrate/20240806144333_create_remote_identities.rb
index eaaed797021d..de87734601a2 100644
--- a/db/migrate/20240806144333_create_remote_identities.rb
+++ b/db/migrate/20240806144333_create_remote_identities.rb
@@ -2,7 +2,7 @@
 
 #-- copyright
 # OpenProject is an open source project management software.
-# Copyright (C) the OpenProject GmbH
+# Copyright (C) 2012-2024 the OpenProject GmbH
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License version 3.
diff --git a/db/migrate/20240808125617_populate_remote_identities.rb b/db/migrate/20240808125617_populate_remote_identities.rb
new file mode 100644
index 000000000000..96639176f670
--- /dev/null
+++ b/db/migrate/20240808125617_populate_remote_identities.rb
@@ -0,0 +1,55 @@
+#-- copyright
+# OpenProject is an open source project management software.
+# Copyright (C) 2012-2024 the OpenProject GmbH
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License version 3.
+#
+# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+# Copyright (C) 2006-2013 Jean-Philippe Lang
+# Copyright (C) 2010-2013 the ChiliProject Team
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+# See COPYRIGHT and LICENSE files for more details.
+#++
+
+class PopulateRemoteIdentities < ActiveRecord::Migration[7.1]
+  def up
+    fields = %i[user_id oauth_client_id origin_user_id]
+
+    OAuthClientToken.where.not(origin_user_id: nil)
+                    .select(:id, *fields)
+                    .find_in_batches do |batch|
+      identities = batch.map { |record| record.slice(*fields) }
+
+      RemoteIdentity.insert_all(identities, unique_by: %i[user_id oauth_client_id])
+    end
+
+    OAuthClientToken.update_all(origin_user_id: nil)
+  end
+
+  def down
+    RemoteIdentity.find_in_batches do |batch|
+      batch.each do |identity|
+        OAuthClientToken
+          .where(user: identity.user, oauth_client: identity.oauth_client)
+          .update_all(origin_user_id: identity.origin_user_id)
+      end
+    end
+
+    RemoteIdentity.delete_all
+  end
+end