diff --git a/contracts/libraries/DualGovernanceConfig.sol b/contracts/libraries/DualGovernanceConfig.sol
index 4c723896..d67f063d 100644
--- a/contracts/libraries/DualGovernanceConfig.sol
+++ b/contracts/libraries/DualGovernanceConfig.sol
@@ -10,7 +10,6 @@ library DualGovernanceConfig {
     // Errors
     // ---
 
-    error InvalidSecondSealRageSupport(PercentD16 secondSealRageQuitSupport);
     error InvalidRageQuitSupportRange(PercentD16 firstSealRageQuitSupport, PercentD16 secondSealRageQuitSupport);
     error InvalidRageQuitEthWithdrawalsDelayRange(
         Duration rageQuitEthWithdrawalsMinDelay, Duration rageQuitEthWithdrawalsMaxDelay
diff --git a/contracts/types/Timestamp.sol b/contracts/types/Timestamp.sol
index f153f71b..6e5b5fd9 100644
--- a/contracts/types/Timestamp.sol
+++ b/contracts/types/Timestamp.sol
@@ -4,7 +4,6 @@ pragma solidity 0.8.26;
 type Timestamp is uint40;
 
 error TimestampOverflow();
-error TimestampUnderflow();
 
 uint256 constant MAX_TIMESTAMP_VALUE = type(uint40).max;