Go to Table Settings > Cataloguing > Items editor table (itemst). Some item fields are missing such as items.cn_sort - Koha normalized classification for sorting items.itemnumber - Koha itemnumber (autogenerated) items.issues - Total Checkouts All three fields are mapped in Koha to MARC Mapping on the system concerned.
Created attachment 188318 [details] [review] Bug 38106: Add missing items table columns to the yml file
Created attachment 188319 [details] [review] Bug 38106: Show attributes even if not in displayed in tab 10 (items)
Hum, I am not convince this second patch is correct. We are now going to show subfields that are not in tab 10, even those "ignored" for instance. It does fix what you described in comment 0 however. Attaching the patches for discussion.