Skip auto delete with some conditions

app/controllers/issues_controller.rb

@@ -632,7 +632,15 @@ class IssuesController < ApplicationController
 
 
     return if @issue.tracker_id != 3 #Support
     return if @issue.tracker_id != 3 #Support
     #Remove subtasks when change from User Story to Support
     #Remove subtasks when change from User Story to Support
-    Issue.where(tracker_id: 8, parent_id: @issue.id).delete_all
+    tasks = Issue.where(tracker_id: 8, parent_id: @issue.id)
+    tasks.each do |task|
+      next if task.description.present?
+      next if task.attachments.present?
+      next if task.time_entries.present?
+      next if task.notes.present?
+      next if task.journals.present?
+      task.delete
+    end
   end
   end
 end
 end