Blank "First Seen" causes a KeyError?

[TonyLeeVT]

Hello, I am running Python 2.7.12 and get the following error. I believe it is caused by a blank "First Seen" field?

python --version
Python 2.7.12

python ./vt.py <some_hash> -s

	Detected by:  0 / 58 
	Sophos Detection: None 
	Kaspersky Detection: None 
	TrendMicro Detection: None 
	Scanned on: 2019-06-07 02:07:31 
	First Seen:
Traceback (most recent call last):
  File "./vt.py", line 128, in <module>
    main()
  File "./vt.py", line 117, in main
    parse(vt.getReport(md5), md5 ,options.verbose, options.jsondump)
  File "./vt.py", line 87, in parse
    print "\n\tResults for MD5: ",it['md5'],"\n\n\tDetected by: ",it['positives'],'/',it['total'],'\n\tSophos Detection:',it['scans']['Sophos']['result'] ,'\n\tKaspersky Detection:',it['scans']['Kaspersky']['result'], '\n\tTrendMicro Detection:',it['scans']['TrendMicro']['result'],'\n\tScanned on:',it['scan_date'],'\n\tFirst Seen:',it['first_seen'],'\n\tLast Seen:',it['last_seen'],'\n\tUnique Sources',it['unique_sources'],'\n\tSubmission Names:'
KeyError: 'first_seen'