Cannot install filter on logstash-6.2.2

[skishenderson]

When I try to install this filter with logstash-6.2.2, I get the following error:

[fh@dl360eg8-75 logstash-6.2.2]$ bin/logstash-plugin install logstash-filter-sequence
Validating logstash-filter-sequence
Installing logstash-filter-sequence
Plugin version conflict, aborting
ERROR: Installation Aborted, message: Bundler could not find compatible versions for gem "logstash-core":
In snapshot (Gemfile.lock):
logstash-core (= 6.2.2)

In Gemfile:
x-pack (= 6.2.2) java depends on
logstash-core (= 6.2.2) java

logstash-input-syslog (>= 0) java depends on
  logstash-filter-grok (>= 0) java depends on
    logstash-core (>= 5.6.0) java

x-pack (= 6.2.2) java depends on
  logstash-core (= 6.2.2) java

logstash-filter-sequence (>= 0) java depends on
  logstash-core (< 3.0.0, >= 2.0.0) java

logstash-core (>= 0) java

Running bundle update will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.

I also unable to find a 'bundle update' with logstash-6.2.2:

[fh@dl360eg8-75 logstash-6.2.2]$ bundle update
-bash: bundle: command not found