From 9fdfc8bf26e94ec230889502cc92477dbd37bde7 Mon Sep 17 00:00:00 2001
From: The3D <emilio@aave.com>
Date: Tue, 6 Oct 2020 18:20:44 +0200
Subject: [PATCH] Added check if the reserve was already added

---
 contracts/lendingpool/LendingPool.sol | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/contracts/lendingpool/LendingPool.sol b/contracts/lendingpool/LendingPool.sol
index 1a5b8152..6016ee95 100644
--- a/contracts/lendingpool/LendingPool.sol
+++ b/contracts/lendingpool/LendingPool.sol
@@ -951,10 +951,14 @@ contract LendingPool is VersionedInitializable, ILendingPool, LendingPoolStorage
     
     require(_reservesCount < MAX_NUMBER_RESERVES, Errors.NO_MORE_RESERVES_ALLOWED);
   
+    bool reserveAlreadyAdded = _reserves[asset].id != 0 || _reservesList[0]==asset;
+
+    if(!reserveAlreadyAdded){
       _reserves[asset].id = uint8(_reservesCount);
       _reservesList[_reservesCount] = asset;
 
       _reservesCount++;
+    }
   }
 
   /**