diff --git a/app/models/issue.rb b/app/models/issue.rb
index 8c7d492e605e9bdcb02ee48a61ed43b3cb9335a6..cd5056aae5e0fa0c7dd02b596458e9d7fe079ed7 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -30,9 +30,6 @@ class Issue < ActiveRecord::Base
   has_many :issue_assignees
   has_many :assignees, class_name: "User", through: :issue_assignees
 
-  has_many :issue_assignees
-  has_many :assignees, class_name: "User", through: :issue_assignees
-
   validates :project, presence: true
 
   scope :in_projects, ->(project_ids) { where(project_id: project_ids) }