1 files changed, 11 insertions, 1 deletions
diff --git a/app/models/email.rb b/app/models/email.rb
index 0140f784842..676e79406e9 100644
--- a/app/models/email.rb
+++ b/app/models/email.rb
@@ -29,7 +29,7 @@ class Email < ApplicationRecord
   end
 
   def unique_email
-    self.errors.add(:email, 'has already been taken') if User.exists?(email: self.email)
+    self.errors.add(:email, 'has already been taken') if primary_email_of_another_user?
   end
 
   def validate_email_format
@@ -40,4 +40,14 @@ class Email < ApplicationRecord
   def update_invalid_gpg_signatures
     user.update_invalid_gpg_signatures if confirmed?
   end
+
+  def user_primary_email?
+    email.casecmp?(user.email)
+  end
+
+  private
+
+  def primary_email_of_another_user?
+    User.where(email: email).where.not(id: user_id).exists?
+  end
 end