To recreate: 1 - Find a patron record in Koha in a category 2 - Create a new patron using the surname and firstname of the above patron 3 - Add a guarantor (be careful to choose a patron in a category that cannot be a guarantee, see bug 37584) 4 - Save 5 - Get a duplicate patron warning 6 - Note the guarantor information is not visible 7 - Save, confirm no guarantor set