OIC: Unable to update instance with custom_endpoint

[nitin23c]

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Terraform Version and Provider Version

Terraform v1.10.2
provider registry.terraform.io/oracle/oci v6.21.0

Affected Resource(s)

oci_integration_integration_instance

Terraform Configuration Files

resource "oci_integration_integration_instance" "prod_integration_instance" {
  #Required
  compartment_id               = var.CompartmentOCID
  display_name                 = var.OICDisplayName
  integration_instance_type    = var.OICInstanceType
  is_byol                      = var.isOICbyol
  message_packs                = var.OICMessagePacks
  domain_id                    = var.OICDomainID
  is_disaster_recovery_enabled = var.OICDisasterRecoveryEnabled
  is_file_server_enabled       = var.OICFileServerEnabled
  is_visual_builder_enabled    = var.OICVisualBuilderEnabled
  custom_endpoint {
    hostname                   = var.OICCustomHostname
  }

  network_endpoint_details {

    allowlisted_http_ips = var.OICAllowlistedIPs
    #Required
    network_endpoint_type = var.OICNetworkEndpointType
    allowlisted_http_vcns {
      id = var.VCNID1
    }
    allowlisted_http_vcns {
      id = var.VCNID2
    }
    is_integration_vcn_allowlisted = var.OICVCNAllowlisted
  }
  shape = var.OICShape
  state = var.OICState
}

Debug Output

https://gist.github.com/nitin23c/bbddf0f24110825207b04fba90af083e

Panic Output

Expected Behavior

Should have updated the OIC instance with custom_endpoint

Actual Behavior

│ Error: Missing required argument
│ 
│   on main.tf line 12, in resource "oci_integration_integration_instance" "demo_integration_instance":
│   12:   custom_endpoint {
│ 
│ The argument "dns_zone_name" is required, but no definition was found.

Steps to Reproduce

1. terraform apply

Important Factoids

References