update pm link_index

app/controllers/api/pm/issues_controller.rb

@@ -20,8 +20,14 @@ class Api::Pm::IssuesController < Api::Pm::BaseController
   end
 
   def link_index
-    pm_issue_type = params[:pm_issue_type] || [1,2,3]
-    object_issues = Issue.includes(:pm_links).where(pm_project_id: params[:pm_project_id], root_id: nil, pm_issue_type: pm_issue_type).where.not(pm_links: { linkable_id: params[:id] } )
+    pm_issue_type = params[:pm_issue_type] || [1, 2, 3]
+    object_issues = Issue.includes(:pm_links).where(
+      pm_project_id: params[:pm_project_id],
+      root_id: nil,
+      pm_issue_type: pm_issue_type
+    ).where.not(
+      id: @issue.pm_links.pluck(:be_linkable_id)
+    )
     @issues = kaminari_paginate(object_issues)
     render 'api/v1/issues/index'
   end