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Yet another example of upgrading that
Here is my experiment for duplicating a forum with a new version of software (tested and worked).
My example uses original forum - 126.96.36.199 and duplicated in vanilla 188.8.131.52.
end result : new forum with new version had all discussions as old one and worked.
Original forum in folder /vanilla database name : vanilla. version 184.108.40.206
New Forum in folder /newvanilla database name : newvanilla. version 220.127.116.11
write down the
from your config.php in your original version of vanilla (in this case it was from 18.104.22.168) on a piece of paper.
install of new version with pristine database
2) download version 22.214.171.124 of vanilla zip and put source files in /newvanilla
run the standard install process in the newvanilla
when asked for user, host, and password (get your piece of paper and type them in correctly matching upper and lower case correctly).
when asked for database name (enter newvanilla (NOT the same as the one in original config.php).
3) installation successful - pristine database. login was successful.
now for import - export process
That's it. (At no time was an old config.php copied into the new one (so as not to confuse things but you can look and compare the two afterwards to see if you missed a setting or two for plugins, notifications etc., cookies, that you want to add.)
Obviously, there are many ways to do things. This is one way. If you've got another way. Write Yet another tutorial.
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.