From c6367041d8a7e28d1ba590963815b3570716ceec Mon Sep 17 00:00:00 2001
From: "Robin C. Ladiges" <Istador@users.noreply.github.com>
Date: Mon, 23 May 2022 17:29:22 +0200
Subject: [PATCH] warn about FLAT_NODES w/ UPDATES incompatibility

See https://github.com/Zverik/regional/issues/17
---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 2d0efdc..65409df 100644
--- a/README.md
+++ b/README.md
@@ -232,6 +232,8 @@ docker run \
     import
 ```
 
+Warning: enabling `FLAT_NOTES` together with `UPDATES` only works for entire planet imports (without a `.poly` file).  Otherwise this will break the automatic update script. This is because trimming the differential updates to the specific regions currently isn't supported when using flat nodes.
+
 ### Benchmarks
 
 You can find an example of the import performance to expect with this image on the [OpenStreetMap wiki](https://wiki.openstreetmap.org/wiki/Osm2pgsql/benchmarks#debian_9_.2F_openstreetmap-tile-server).