fix: Fixed paddle relink sub

admin/internal/billing/subscription.go

@@ -124,9 +124,9 @@ func handleSubscription(ctx context.Context, ev Event) error {
 }
 
 // resolveInstance finds the instance a webhook's custom_data names, following the
-// placeholder alias when the id is one a self-hosted claim has since replaced.
-// It returns the instance's CURRENT id, which is the only id anything else should
-// be written against.
+// identity trail when the id is one a placeholder claim or a relink has since
+// replaced. It returns the instance's CURRENT id, which is the only id anything
+// else should be written against.
 func resolveInstance(ctx context.Context, customDataID string) (string, models.Instance, error) {
 	var inst models.Instance
 	err := db.Admin("admin_instances").FindOne(ctx,
@@ -138,7 +138,7 @@ func resolveInstance(ctx context.Context, customDataID string) (string, models.I
 		return "", inst, err
 	}
 	if err := db.Admin("admin_instances").FindOne(ctx,
-		bson.M{"linked_from_placeholder_id": customDataID}).Decode(&inst); err != nil {
+		bson.M{"previous_instance_ids": customDataID}).Decode(&inst); err != nil {
 		return "", inst, err
 	}
 	return inst.InstanceID, inst, nil