Upgrade Error - Could not get lock

[Marty]

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Install Updates Error log
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Install Updates could not successfully download and install available updates.
Go to https://www.linuxliteos.com/forums/ and paste the log below into the Software - Support - Updates section for assistance.

============ Log ===========

E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 5907 (apt-get)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?