Plugin Updates Showing in Main Joomla Update

In Joomla 5
We are being notified in the main Joomla extension update block that:

• CB Gallery Bot
• CB Gallery Module
• CB Gallery Search Bot

needs updating. 

These are plugins and should not be showing in the Joomla Extension Block as needing an update. 
When you try to install, you get the following error:
Failed to download the package. Download it and install manually from  www.joomlapolis.com/index.php ?

You go to Components, Community Builder, Plugin Management, and check, but no updates are available.

This has been going on for months.  There was an update to these plugins last month, so I updated them, and they vanished from the Joomla update until I logged out and logged in again. Then they were back, saying 3 updates needed.  Yet there are no updates.

Soon we will upgrade to Joomla 6, so I need errors like this first.  Any idea?

Disable or delete those update sites within System > Update > Update Sites. Joomla isn't able to handle our build version numbers so its version check ends up being incorrect. Those weren't meant to be released, but were by accident and are disabled in latest release. In a future release you'll be able to update all our plugins entirely through Joomla as we convert them into Joomla extensions (moving away from our separate plugin management).

Thank you, I have done this.
Cheers.