From 82fb9ee9fc487be90afbec942c1056d2afd6304f Mon Sep 17 00:00:00 2001
From: Yair Morgenstern <yairm210@hotmail.com>
Date: Thu, 12 Nov 2020 19:35:52 +0200
Subject: [PATCH] Mods can now remove promotions between versions without
 breaking existing saves

---
 core/src/com/unciv/logic/GameInfo.kt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/core/src/com/unciv/logic/GameInfo.kt b/core/src/com/unciv/logic/GameInfo.kt
index 192f730666..20118b630e 100644
--- a/core/src/com/unciv/logic/GameInfo.kt
+++ b/core/src/com/unciv/logic/GameInfo.kt
@@ -261,6 +261,11 @@ class GameInfo {
                 tile.resource = null
             if (tile.improvement != null && !ruleSet.tileImprovements.containsKey(tile.improvement!!))
                 tile.improvement = null
+
+            for (unit in tile.getUnits())
+                for (promotion in unit.promotions.promotions.toList())
+                    if (!ruleSet.unitPromotions.containsKey(promotion))
+                        unit.promotions.promotions.remove(promotion)
         }
 
         tileMap.setTransients(ruleSet)