Event unackowledge or add event message and unacknowledge

[DopplerSzz]

In Zabbix 3.2, looking to uses API to update an event with an ITSM incident # that we auto generated. Problem being when i update the message field in the event acknowledge it always completes the acknowledgement. Is there a way to place data in the event with the ITSM ticket # without the acknowledge? Or perhaps go back after placing the ticket # in and force the unacknowledge? We need the help desk to do the acknowledgement of the event.

Currently:
my $ackEvents = $apiSession -> do ( 'event.acknowledge', { eventids => "$eventId", message => "$incNumber", action => 0 } );

So,even with Action =>0 it acknowledges.

Any other ways to provide the ticket # from ITSM without the disrupting the acknowledgment?

[DopplerSzz]

Or is there a way to update an event tag via API so we can place the incident # in the tag and not have to worry about the ACK?