function changePrice(uint256 _tokenId, uint64 _pricePlat) external whenNotPaused {
        require(tokenContract.ownerOf(_tokenId) == msg.sender);
        uint256 lastIndex = latestAction[_tokenId];
        require(lastIndex > 0);
        Auction storage order = auctionArray[lastIndex];
        require(order.seller == msg.sender);
        require(order.tmSell == 0);

        uint64 tmNow = uint64(block.timestamp);
        require(order.tmStart + auctionDuration > tmNow);
        
        require(_pricePlat >= 1 && _pricePlat <= 999999);
        order.price = _pricePlat;

        AuctionPlatPriceChange(lastIndex, msg.sender, _tokenId, _pricePlat);
    }