We would like to know when we can use ticket types in HaloPSA that have mandatory fields, so this issue can be closed - https://support.huntress.io/hc/en-us/articles/22491122152723-Halo-PSA-Ticket-Integration

Note: If you are using Mandatory ticket fields within HaloPSA outside of "Ticket Type," the Huntress integration will not be able to create tickets and will error. While we work on addressing this feature to allow for future use of other required fields, you may opt to remove the mandatory field option within HaloPSA or choose a different ticket type without mandatory fields to allow the integration to run correctly.