Update CHANGELOG.md for #22996

CHANGELOG.md

@@ -15,6 +15,7 @@ BREAKING CHANGES:
 * resource/aws_elasticsearch_domain: `ebs_options.0.volume_type` can no longer be set to `""`; instead, remove or set to `null` ([#22954](https://github.com/hashicorp/terraform-provider-aws/issues/22954))
 * resource/aws_fsx_ontap_storage_virtual_machine: Remove deprecated `active_directory_configuration.0.self_managed_active_directory_configuration.0.organizational_unit_distinguidshed_name`, migrating value to `active_directory_configuration.0.self_managed_active_directory_configuration.0.organizational_unit_distinguished_name` ([#22915](https://github.com/hashicorp/terraform-provider-aws/issues/22915))
 * resource/aws_instance: `private_ip` can no longer be set to `""`; remove or set to `null` ([#22948](https://github.com/hashicorp/terraform-provider-aws/issues/22948))
+* resource/aws_lb_target_group: For `protocol = "TCP"`, `stickiness` can no longer be type set to `lb_cookie` even when `enabled = false`; instead use type `source_ip` ([#22996](https://github.com/hashicorp/terraform-provider-aws/issues/22996))
 * resource/aws_network_acl: These arguments can no longer be set to `""`: `egress.*.cidr_block`, `egress.*.ipv6_cidr_block`, `ingress.*.cidr_block`, or `ingress.*.ipv6_cidr_block` ([#22928](https://github.com/hashicorp/terraform-provider-aws/issues/22928))
 * resource/aws_route: Exactly one of these can be set: `destination_cidr_block`, `destination_ipv6_cidr_block`, `destination_prefix_list_id`. These arguments can no longer be set to `""`: `destination_cidr_block`, `destination_ipv6_cidr_block`. ([#22931](https://github.com/hashicorp/terraform-provider-aws/issues/22931))
 * resource/aws_route_table: These arguments can no longer be set to `""`: `route.*.cidr_block`, `route.*.ipv6_cidr_block` ([#22931](https://github.com/hashicorp/terraform-provider-aws/issues/22931))