diff --git a/app/models/school.rb b/app/models/school.rb
index 2f14500b0..0080abeeb 100644
--- a/app/models/school.rb
+++ b/app/models/school.rb
@@ -31,7 +31,11 @@ class School < ApplicationRecord
             format: { with: /\A[0-9]+[A-Z]+\z/, allow_nil: true, message: I18n.t('validations.school.school_roll_number') },
             presence: true,
             if: :ireland?
-  validates :creator_id, presence: true, uniqueness: true
+  validates :creator_id,
+            presence: true,
+            uniqueness: {
+              conditions: -> { where(rejected_at: nil) }
+            }
   validates :creator_agree_authority, presence: true, acceptance: true
   validates :creator_agree_terms_and_conditions, presence: true, acceptance: true
   validates :creator_agree_responsible_safeguarding, presence: true, acceptance: true
@@ -53,7 +57,7 @@ class School < ApplicationRecord
   after_create :generate_code!, if: -> { FeatureFlags.immediate_school_onboarding? }
 
   def self.find_for_user!(user)
-    school = Role.find_by(user_id: user.id)&.school || find_by(creator_id: user.id)
+    school = Role.find_by(user_id: user.id)&.school || find_by(creator_id: user.id, rejected_at: nil)
     raise ActiveRecord::RecordNotFound unless school
 
     school
diff --git a/db/migrate/20260323152328_update_creator_id_index_on_schools.rb b/db/migrate/20260323152328_update_creator_id_index_on_schools.rb
new file mode 100644
index 000000000..f7698eb83
--- /dev/null
+++ b/db/migrate/20260323152328_update_creator_id_index_on_schools.rb
@@ -0,0 +1,20 @@
+class UpdateCreatorIdIndexOnSchools < ActiveRecord::Migration[7.2]
+  def up
+    remove_index :schools, name: "index_schools_on_creator_id"
+
+    add_index :schools,
+              :creator_id,
+              unique: true,
+              where: "rejected_at IS NULL",
+              name: "index_schools_on_creator_id_active_only"
+  end
+
+  def down
+    remove_index :schools, name: "index_schools_on_creator_id_active_only"
+
+    add_index :schools,
+              :creator_id,
+              unique: true,
+              name: "index_schools_on_creator_id"
+  end
+end
\ No newline at end of file