Update Setting up GCP Private Service Connect.md

Adding a note that old psc to defunct projects must be removed first

docs/Using AWS GCP private VPC connections/Setting up GCP Private Service Connect.md

@@ -1,6 +1,6 @@
 # Setting up GCP Private Service Connect
 
-!!! Note
+!!! Note:
     GCP Private Service Connect (PSC) is used for private connections within the same GCP region.
 
     Prior to configuring PSC on a SkySQL service, you must have created a VPC with a private subnet that will be used to communicate with private IP addresses. 
@@ -48,6 +48,9 @@ For the next step, see the [GCP Endpoint Setup](#gcp-endpoint-setup) sections
 
 To disable GCP Private Service Connect via the SkySQL Portal:
 
+!!! Note:
+    Adding a new PSC will fail unless existing PSC to deleted projects are deleted.
+
 1. Visit the SkySQL Portal.
 2. Find the service that you would like to modify.
 3. Click "MANAGE" on the far right side of the service listing.