From d9c5025a35cc712ee380ddd0a6074e76a4e07ced Mon Sep 17 00:00:00 2001
From: Stian Grenborgen <stiangre@ifi.uio.no>
Date: Thu, 25 Jul 2024 14:56:34 +0200
Subject: [PATCH] Avoids building the same tile improvement twice when making
 an AI colony plan.

---
 .../common/model/production/TileProductionCalculator.java      | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/net/sf/freecol/common/model/production/TileProductionCalculator.java b/src/net/sf/freecol/common/model/production/TileProductionCalculator.java
index 690062198a..70957e7889 100644
--- a/src/net/sf/freecol/common/model/production/TileProductionCalculator.java
+++ b/src/net/sf/freecol/common/model/production/TileProductionCalculator.java
@@ -139,6 +139,9 @@ public MaximumPotentialProduction getMaximumPotentialProduction(GoodsType goodsT
                 .collect(Collectors.toList());
         
         for (TileImprovementType tit : getNormalImprovements(spec, originalTileType)) {
+            if (!tile.isImprovementTypeAllowed(tit)) {
+                continue;
+            }
             final ProductionInfo newResult = getBasicProductionInfo(tile, turn, new WorkerAssignment(unitType, originalProductionType), colonyCenterTile, List.of(tit));
             final int amount = productionOfGoodsType(goodsType, newResult);
             if (amount > currentMaximumPotentialProduction) {