[Koha] Setting up a koha mirror with read only access to the koha database

Hello, I would like to setup a second Koha server on a separate machine M, with read-only access to the koha database on our main machine K. (and update permission to the table zebraqueue) So what I did was to create the user mentioned in the file outputted by koha-create --request-db on the database on machine K. Then I edited the koha-conf.xml to use the same database as the one Koha on machine S is using, Everything including zebra-indexing on machine M ran fine, but the only issue I am facing is that opac logins logs out automatically very quickly. What could be the reason behind this? Regards, Dalton