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-rw-r--r--app/models/canonical_email_block.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/app/models/canonical_email_block.rb b/app/models/canonical_email_block.rb
index a8546d65a..be8c45bfe 100644
--- a/app/models/canonical_email_block.rb
+++ b/app/models/canonical_email_block.rb
@@ -15,7 +15,7 @@ class CanonicalEmailBlock < ApplicationRecord
 
   belongs_to :reference_account, class_name: 'Account'
 
-  validates :canonical_email_hash, presence: true
+  validates :canonical_email_hash, presence: true, uniqueness: true
 
   def email=(email)
     self.canonical_email_hash = email_to_canonical_email_hash(email)