failure on mass update

[harri]

Trying to reset the History Storage Period of all items in the Template OS OpenBSD back to the 90d default I got this error message:

Cannot update items
Details
Undefined index: type [items.php:999 → CApiWrapper->__call() → CFrontendApiWrapper->callMethod() → CApiWrapper->callMethod() → CFrontendApiWrapper->callClientMethod() → CLocalApiClient->callMethod() → CItem->update() → CItem->inherit() → CItemGeneral->prepareInheritedItems() in include/classes/api/services/CItemGeneral.php:1024]
Undefined index: type [items.php:999 → CApiWrapper->__call() → CFrontendApiWrapper->callMethod() → CApiWrapper->callMethod() → CFrontendApiWrapper->callClientMethod() → CLocalApiClient->callMethod() → CItem->update() → CItem->inherit() → CItemGeneral->prepareInheritedItems() in include/classes/api/services/CItemGeneral.php:1025]
array_key_exists(): The first argument should be either a string or an integer [items.php:999 → CApiWrapper->__call() → CFrontendApiWrapper->callMethod() → CApiWrapper->callMethod() → CFrontendApiWrapper->callClientMethod() → CLocalApiClient->callMethod() → CItem->update() → CItem->inherit() → CItemGeneral->prepareInheritedItems() → CItemGeneral::findInterfaceForItem() → array_key_exists() in include/classes/api/services/CItemGeneral.php:696]
Cannot find host interface on "gate5a.example.com" for item key "agent.hostname".

I just made the upgrade from Zabbix 3.0 to 3.4. Database is mariadb.

Every helpful suggestion is highly appreciated.

[harri]

Problem solved: It cannot update nested templates. Maybe some warning would be helpful instead of a cryptic error message.