Running version: 1.4.11.10#dev
Python version: 2.7.18
Operating system: Linux-5.4.0-53-generic-x86_64-with-Ubuntu-20.04-focal
Command line: /usr/bin/sqlmap -m /tmp/a --level=5 --batch --alert=tee /tmp/a --threads=10 --tamper=space2comment --random-agent --crawl 1
Technique: BOOLEAN
Back-end DBMS: MySQL (fingerprinted)

Traceback (most recent call last):
  File "sqlmap", line 213, in main
    start()
  File "/share/sqlmap/lib/core/decorators.py", line 78, in _
    result = f(*args, **kwargs)
  File "/share/sqlmap/lib/controller/controller.py", line 592, in start
    injection = checkSqlInjection(place, parameter, value)
  File "/share/sqlmap/lib/controller/checks.py", line 858, in checkSqlInjection
    kb.vulnHosts.remove(conf.hostname)
KeyError: ********************