diff --git a/app/models/p_customer.rb b/app/models/p_customer.rb
index b46d4f4..567b23a 100644
--- a/app/models/p_customer.rb
+++ b/app/models/p_customer.rb
@@ -71,7 +71,7 @@ class PCustomer < ApplicationRecord
   validates :cgv, :presence => true, :if => :require_cgv
   validates :rgpd, :presence => true, :if => :require_cgv
   
-  validates :past_id, :uniqueness => true
+  validates :past_id, :uniqueness => true, :if => :imported
   
   def do_import
     if self.imp_iban? and self.imp_bic?