From d88c7be9878ebf5775ea3bfbcfdc288983164f84 Mon Sep 17 00:00:00 2001
From: yairm210 <yairm210@hotmail.com>
Date: Mon, 25 Aug 2025 10:53:49 +0300
Subject: [PATCH] Handle mods adding/removing eras

---
 core/src/com/unciv/logic/BackwardCompatibility.kt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/core/src/com/unciv/logic/BackwardCompatibility.kt b/core/src/com/unciv/logic/BackwardCompatibility.kt
index a7d788badb..792bd3a3a4 100644
--- a/core/src/com/unciv/logic/BackwardCompatibility.kt
+++ b/core/src/com/unciv/logic/BackwardCompatibility.kt
@@ -37,6 +37,12 @@ object BackwardCompatibility {
         handleMissingReferencesForEachCity()
 
         removeTechAndPolicies()
+        updateMissingStartingEra()
+    }
+
+    private fun GameInfo.updateMissingStartingEra() {
+        if (gameParameters.startingEra in ruleset.eras) return
+        gameParameters.startingEra = ruleset.eras.keys.first()
     }
 
     fun GameInfo.migrateGreatGeneralPools() {