diff --git a/nel/tools/build_gamedata/b3_shard_dev.py b/nel/tools/build_gamedata/b3_shard_dev.py
index c596f7c31..21ba42aeb 100644
--- a/nel/tools/build_gamedata/b3_shard_dev.py
+++ b/nel/tools/build_gamedata/b3_shard_dev.py
@@ -72,6 +72,9 @@ cfg.write("StartCommands += {\n")
 cfg.write("	// Don't launch AES on development shard for now\n")
 cfg.write("	\"gw_aes.transportRemove aes_l3c\",\n")
 cfg.write("};\n")
+cfg.write("NegFiltersWarning += {\n")
+cfg.write("	\"already inserted from\",\n")
+cfg.write("};\n")
 cfg.write("DontNeedBackend = 1;\n")
 cfg.flush()
 cfg.close()