//id-staking-v2/contracts/IdentityStaking.sol
  function extendSelfStake(uint64 duration) external whenNotPaused {
...
    uint64 unlockTime = duration + uint64(block.timestamp);

    if (
      // Must be between 12 weeks and 104 weeks
      unlockTime < block.timestamp + 12 weeks ||
      unlockTime > block.timestamp + 104 weeks ||
      // Must be later than any existing lock
|>      unlockTime < selfStakes[msg.sender].unlockTime //@audit This allows the new unlockTime to be the same as the old unlockTime.
    ) {
      revert InvalidLockTime();
    }

    selfStakes[msg.sender].unlockTime = unlockTime;
...
}
  function extendCommunityStake(address stakee, uint64 duration) external whenNotPaused {
...
    if (
      // Must be between 12 weeks and 104 weeks
      unlockTime < block.timestamp + 12 weeks ||
      unlockTime > block.timestamp + 104 weeks ||
      // Must be later than any existing lock
|>      unlockTime < comStake.unlockTime. //@audit This allows the new unlockTime to be the same as the old unlockTime.
    ) {
      revert InvalidLockTime();
    }
...
