From b31c6f3ec78692bf712f056b22c6e115f90a3627 Mon Sep 17 00:00:00 2001
From: YueR <yuer@promote.cache-dns.local>
Date: Mon, 9 Sep 2019 08:26:17 +0800
Subject: [PATCH] fix that researched tech can be picked when we pick a free
 tech

---
 core/src/com/unciv/ui/pickerscreens/TechPickerScreen.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/com/unciv/ui/pickerscreens/TechPickerScreen.kt b/core/src/com/unciv/ui/pickerscreens/TechPickerScreen.kt
index 9c9fd3d14b..1d33407bf3 100644
--- a/core/src/com/unciv/ui/pickerscreens/TechPickerScreen.kt
+++ b/core/src/com/unciv/ui/pickerscreens/TechPickerScreen.kt
@@ -189,7 +189,7 @@ class TechPickerScreen(internal val civInfo: CivilizationInfo, centerOnTech: Tec
 
 
     private fun selectTechnologyForFreeTech(tech: Technology) {
-        if (researchableTechs.contains(tech.name)) {
+        if (researchableTechs.contains(tech.name)&&!civTech.isResearched(tech.name)) {
             pick("Pick [${selectedTech!!.name}] as free tech".tr())
         } else {
             rightSideButton.setText("Pick a free tech".tr())