Hello I have quick question

I created beta.domain.com slave in order to have testing environment for any upgrades.

I use new template where I defined to copy everything and sharing was disabled.

The goal is to install new components and test them on slave without any harm to master and other slaves

While installing on beta still got

The version of the extension is not identical to the one installed by the master site.

Thank you

The concept of Jms Multi Sites is to share the same Joomla installation (PHP Code).
So normally all the slave site are supposed sharing the same files and folder.
When a slave site is defined in the list of slave, JMS detect this case and add some verification that the extension that you are trying to install in a slave site has exactly the same version as the one in the master.

So this is normal that you receive such error message as you are trying to have a different version in your slave site.