diff --git a/contracts/libraries/helpers/Errors.sol b/contracts/libraries/helpers/Errors.sol
index d25b041b..4f3f6daa 100644
--- a/contracts/libraries/helpers/Errors.sol
+++ b/contracts/libraries/helpers/Errors.sol
@@ -48,7 +48,6 @@ library Errors {
   string public constant CALLER_MUST_BE_LENDING_POOL = '28'; // 'The caller of this function must be a lending pool'
   string public constant CANNOT_GIVE_ALLOWANCE_TO_HIMSELF = '30'; // 'User cannot give allowance to himself'
   string public constant TRANSFER_AMOUNT_NOT_GT_0 = '31'; // 'Transferred amount needs to be greater than zero'
-  string public constant INVALID_ATOKEN_BALANCE = '52'; // balance on burning is invalid
 
   // require error messages - ReserveLogic
   string public constant RESERVE_ALREADY_INITIALIZED = '34'; // 'Reserve has already been initialized'