diff --git a/app/models/estimate.rb b/app/models/estimate.rb
index 1f2c2f8..298f854 100644
--- a/app/models/estimate.rb
+++ b/app/models/estimate.rb
@@ -10,7 +10,7 @@
 
 class Estimate < QboBaseModel
 
-  has_and_belongs_to_many :issues
+  has_many :issues
   belongs_to :customer 
   validates_presence_of :doc_number, :id
   self.primary_key = :id