Existence tests of filesystem service is a syntax error

[Former user]

Using the following monitrc

#!

check filesystem nfs-mount with path "192.168.39.20:/mnt/test"
  if not exist then exec "/usr/bin/mount /root/test"

The documentation says, "It is supported for process, file, directory, filesystem and fifo services." However, I get an error "/etc/monit.d/nfs-mount.conf:2: syntax error 'not'" in the case of filesystem service

Using Monit 5.22.0 (downloaded from the mmonit/monit page) on CentOS 7.3.1611

[Tildeslash]

Fixed: Issue #603: Support existence/nonexistence test for filesystem check.

→ <<cset 1c209468068b>>

[Prince Jain]

@Tildeslash I am doing filesystem existence test on RPi Compute module. I am still getting this error, how can I upgrade monit to solve this?