Is it possible to join two databases in ojs?

I have a 2.3.6 ojs version , and need to upgrade to 2.4.8 and to 3.1.1.2.
But i have a two BD one in 2.3.6 ojs version, and other to 2.4.8.

Has anyone done a similar process and can help me?

Hi @Vitor_R,

merging databases directly is almost not possible. What you can do is to export all issues articles and issues from one OJS and import to another.

Regards, Primo┼ż