Close is lower than low

In MCX bhavcopy, some times closing price in lower than intraday low. On 28-02-2018, following is cotton EOD data:
Date Instrument Name Symbol Expiry Date Open High Low Close PC
28 Feb 18 FUTCOM COTTON 28 Feb 18 20220 20600 20180 19750 20170

Here day’s low is 20180 and close is 19750. I have seen this thing on other days and other symbols also.

I have never seen this thing in equity. Please explain.