Fixes #5533: Fix bulk editing of objects with required custom fields

docs/release-notes/version-2.10.md

@@ -7,6 +7,7 @@
 * [#5301](https://github.com/netbox-community/netbox/issues/5301) - Fix misleading error when racking a device with invalid parameters
 * [#5311](https://github.com/netbox-community/netbox/issues/5311) - Update child objects when a rack group is moved to a new site
 * [#5518](https://github.com/netbox-community/netbox/issues/5518) - Fix persistent vertical scrollbar
+* [#5533](https://github.com/netbox-community/netbox/issues/5533) - Fix bulk editing of objects with required custom fields
 * [#5540](https://github.com/netbox-community/netbox/issues/5540) - Fix exception when viewing a provider with one or more tags assigned
 * [#5543](https://github.com/netbox-community/netbox/issues/5543) - Fix rendering of config contexts with cluster assignment for devices
 

netbox/netbox/views/generic.py

@@ -798,8 +798,8 @@ class BulkEditView(GetReturnURLMixin, ObjectPermissionRequiredMixin, View):
                             # Update custom fields
                             for name in custom_fields:
                                 if name in form.nullable_fields and name in nullified_fields:
-                                    obj.custom_field_data.pop(name, None)
-                                else:
+                                    obj.custom_field_data[name] = None
+                                elif form.cleaned_data.get(name) not in (None, ''):
                                     obj.custom_field_data[name] = form.cleaned_data[name]
 
                             obj.full_clean()