Marger 2 ojs into 1 ojs

hi,
I want to ask.
I want to marge 2 of OJS into 1 OJS. what should I prepare?

for example. ojs1.example.ac.id and ojs2.example.ac.id. will be merged into ojs3.example.ac.id

thank you for the help

Will this be a merge of two journals into one journal, or of two journals into one site (retaining two distinct journals)?

If the latter, see: