I created a copy of existing page which had one label 'label1'. In this new copy page I'm tying to delete label1 and add label2. It is removed and showing only 'label2'. When returning to same page later it still has label1 and label2. label1 is back and I can remove it for a moment, but it is coming back. Initial page was created long time ago from template which had label1 label, but this template does not exists anymore. What makes label1 coming back? When I create a new page from create button then labels work properly. Any ideas what can cause this or how to fix it?