When trying to link template "x5.snmp" to template "x5.hw.hpe.proliant", I'll get an error "Cannot update template": 

• Cannot inherit LLD rule with key "system.net.uptime[sysUpTime.0]" of template "x5.hw.hpe.proliant" to host "racktables.5881", because an item with the same key already exists. [templates.php:299 → CApiWrapper->__call() → CFrontendApiWrapper->callMethod() → CApiWrapper->callMethod() → CFrontendApiWrapper->callClientMethod() → CLocalApiClient->callMethod() → CTemplate->update() → CHostGeneral->updateTemplates() → CHostGeneral::linkTemplatesObjects() → CItem::linkTemplateObjects() → CItem::inherit() → CItem::inheritChunk() → CItem::inherit() → CItem::inheritChunk() → CItem::getChildObjectsUsingName() → CItemGeneral::showObjectMismatchError() → CApiService::exception() in include/classes/api/services/CItemGeneral.php:786]
  There is "x5.hw.hpe.proliant" without any LLD!

There is "x5.snmp" without any LLD!

There is host "racktables.5881" without any LLD!

What is wrong? This key persists only in "x5.snmp" template. Seems there is a bug occurred!