diff --git a/pkg/db/fixtures/users.yml b/pkg/db/fixtures/users.yml
index 8d251da66..9e7811924 100644
--- a/pkg/db/fixtures/users.yml
+++ b/pkg/db/fixtures/users.yml
@@ -145,6 +145,15 @@
   issuer: local
   updated: 2018-12-02 15:13:12
   created: 2018-12-01 15:13:12
+# User scheduled for deletion — used by admin reassign-owner guard tests.
+- id: 20
+  username: 'user20'
+  password: '$2a$04$X4aRMEt0ytgPwMIgv36cI..7X9.nhY/.tYwxpqSi0ykRHx2CwQ0S6' # 12345678
+  email: 'user20@example.com'
+  issuer: local
+  deletion_scheduled_at: 2099-01-01 00:00:00
+  updated: 2018-12-02 15:13:12
+  created: 2018-12-01 15:13:12
 # User with openid avatar provider for SSO avatar reset tests
 - id: 19
   username: 'user_openid_avatar'
diff --git a/pkg/migration/20260415143536.go b/pkg/migration/20260415143536.go
new file mode 100644
index 000000000..3d3d09131
--- /dev/null
+++ b/pkg/migration/20260415143536.go
@@ -0,0 +1,43 @@
+// Vikunja is a to-do list application to facilitate your life.
+// Copyright 2018-present Vikunja and contributors. All rights reserved.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package migration
+
+import (
+	"src.techknowlogick.com/xormigrate"
+	"xorm.io/xorm"
+)
+
+type users20260415143536 struct {
+	IsAdmin bool `xorm:"not null default false" json:"-"`
+}
+
+func (users20260415143536) TableName() string {
+	return "users"
+}
+
+func init() {
+	migrations = append(migrations, &xormigrate.Migration{
+		ID:          "20260415143536",
+		Description: "add is_admin column to users",
+		Migrate: func(tx *xorm.Engine) error {
+			return tx.Sync(users20260415143536{})
+		},
+		Rollback: func(tx *xorm.Engine) error {
+			return nil
+		},
+	})
+}