Expected behavior

just safe the object without the warning...

Actual behavior

The Warning: "Attempt to read property "containerKey" on null" appears when i want to save a data object.

The message does not appear with all, but only with a certain class of data objects. I have for me at the moment no approach where I can look for the error.

Also, I can't edit this data object in the table view either, I always have to open the object first.

Status: 500 |
URL: /admin/object/save?task=publish
Method: PUT
Message: Warning: Attempt to read property "containerKey" on null
Trace:
in /home/xxx/pimcore_live/vendor/pimcore/pimcore/lib/DataObject/GridColumnConfig/Value/DefaultValue.php:197
#0 /home/xxx/pimcore_live/vendor/pimcore/pimcore/lib/DataObject/GridColumnConfig/Operator/Base64.php(55): Pimcore\DataObject\GridColumnConfig\Value\DefaultValue->getLabeledValue(Object(Pimcore\Model\DataObject\Keyboard))
#1 /home/xxx/pimcore_live/vendor/pimcore/pimcore/models/DataObject/Service.php(560): Pimcore\DataObject\GridColumnConfig\Operator\Base64->getLabeledValue(Object(Pimcore\Model\DataObject\Keyboard))
#2 /home/xxx/pimcore_live/vendor/pimcore/pimcore/models/DataObject/Service.php(1976): Pimcore\Model\DataObject\Service::calculateCellValue(Object(Pimcore\Model\DataObject\Keyboard), Array, '#62fc901fc9aba', Array)
#3 /home/xxx/pimcore_live/vendor/pimcore/pimcore/models/DataObject/Service.php(1830): Pimcore\Model\DataObject\Service::getCsvFieldData('de', '#62fc901fc9aba', Object(Pimcore\Model\DataObject\Keyboard), 'de', Array)
#4 /home/xxx/pimcore_live/vendor/pimcore/data-hub-file-export/src/Exporter/AbstractExporter.php(297): Pimcore\Model\DataObject\Service::getCsvDataForObject(Object(Pimcore\Model\DataObject\Keyboard), 'de', Array, Array, Object(Pimcore\Localization\LocaleService), true, Array)
#5 /home/xxx/pimcore_live/vendor/pimcore/data-hub-file-export/src/Exporter/File.php(105): Pimcore\Bundle\DataHubFileExportBundle\Exporter\AbstractExporter->getItemData(Object(Pimcore\Model\DataObject\Keyboard))
#6 /home/xxx/pimcore_live/vendor/pimcore/data-hub-file-export/src/Exporter/AbstractExporter.php(388): Pimcore\Bundle\DataHubFileExportBundle\Exporter\File->getItemData(Object(Pimcore\Model\DataObject\Keyboard))
#7 /home/xxx/pimcore_live/vendor/pimcore/data-hub-file-export/src/EventSubscriber/DataObjectSubscriber.php(99): Pimcore\Bundle\DataHubFileExportBundle\Exporter\AbstractExporter->getExportData(Array)
#8 /home/xxx/pimcore_live/vendor/symfony/event-dispatcher/Debug/WrappedListener.php(117): Pimcore\Bundle\DataHubFileExportBundle\EventSubscriber\DataObjectSubscriber::doExport(Object(Pimcore\Event\Model\DataObjectEvent), 'pimcore.dataobj...', Object(Symfony\Component\HttpKernel\Debug\TraceableEventDispatcher))
#9 /home/xxx/pimcore_live/vendor/symfony/event-dispatcher/EventDispatcher.php(230): Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke(Object(Pimcore\Event\Model\DataObjectEvent), 'pimcore.dataobj...', Object(Symfony\Component\HttpKernel\Debug\TraceableEventDispatcher))
#10 /home/xxx/pimcore_live/vendor/symfony/event-dispatcher/EventDispatcher.php(59): Symfony\Component\EventDispatcher\EventDispatcher->callListeners(Array, 'pimcore.dataobj...', Object(Pimcore\Event\Model\DataObjectEvent))
#11 /home/xxx/pimcore_live/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php(154): Symfony\Component\EventDispatcher\EventDispatcher->dispatch(Object(Pimcore\Event\Model\DataObjectEvent), 'pimcore.dataobj...')
#12 /home/xxx/pimcore_live/vendor/pimcore/pimcore/lib/Event/Traits/RecursionBlockingEventDispatchHelperTrait.php(41): Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch(Object(Pimcore\Event\Model\DataObjectEvent), 'pimcore.dataobj...')
#13 /home/xxx/pimcore_live/vendor/pimcore/pimcore/models/DataObject/AbstractObject.php(822): Pimcore\Model\Element\AbstractElement->dispatchEvent(Object(Pimcore\Event\Model\DataObjectEvent), 'pimcore.dataobj...')
#14 /home/xxx/pimcore_live/vendor/pimcore/pimcore/models/DataObject/Concrete.php(720): Pimcore\Model\DataObject\AbstractObject->save(Array)
#15 /home/xxx/pimcore_live/vendor/pimcore/pimcore/bundles/AdminBundle/Controller/Admin/DataObject/DataObjectController.php(1375): Pimcore\Model\DataObject\Concrete->save()
#16 /home/xxx/pimcore_live/vendor/symfony/http-kernel/HttpKernel.php(153): Pimcore\Bundle\AdminBundle\Controller\Admin\DataObject\DataObjectController->saveAction(Object(Symfony\Component\HttpFoundation\Request))
#17 /home/xxx/pimcore_live/vendor/symfony/http-kernel/HttpKernel.php(75): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1)
#18 /home/xxx/pimcore_live/vendor/symfony/http-kernel/Kernel.php(202): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#19 /home/xxx/pimcore_live/public/index.php(37): Symfony\Component\HttpKernel\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request))
#20 {main}

Steps to reproduce

hard to say... it´s just in my specific data object