Cannot set custom date field to null via API

I use PHP SDK to update a custom date field. It woks fine when I send new date but when I try to clear the field (by sending null, “”, false) nothing happens. How can I clear the value of date custom field via API.

Hey @Pawel_Gniadkowski
Welcome to the community :wave:
Can you share the code snippet perhaps? It would help us narrow down the problem.

Usually setting NULL for custom date fields would work

$deals = $client->getDeals();
$data['id'] = 35;
$data['9d94fc3c9c6359252562852a698afe861472d26d'] = NULL;
$results = $deals->updateADeal($data);