Update docs/guides/migration_guide_vpcgw_v2.md

Co-authored-by: Rowena Jones <[email protected]>

Author: yfodil

docs/guides/migration_guide_vpcgw_v2.md

@@ -4,7 +4,7 @@ page_title: "Moving a Public Gateway from Legacy mode to IPAM mode, for v2 compa
 
 # Moving a Public Gateway from Legacy mode to IPAM mode.
 
-This guide explains how to migrate from the legacy VPC gateway configuration (v1) to the new v2 API.
+This guide explains how to move a Public Gateway from [Legacy mode](https://www.scaleway.com/en/docs/public-gateways/concepts/#ipam) to IPAM mode. Only gateways in IPAM mode will be compatible with the new v2 of the Public Gateways API. v1 of the API is deprecated, and will be removed later this year.
 In the legacy setup, DHCP and DHCP reservations are managed with dedicated resources and referenced in the gateway network.
 In v2, the public gateway is migrated to use IPAM (IP Address Management) mode.
 In 2023, DHCP functionality was moved from Public Gateways to Private Networks, DHCP resources are now no longer needed.