upgrade Jahia 7.3 Jahia 8 Legacy

Upgrade fails (build number does not match)


Upgrade fails with

ERROR: detected installed build number does not match fix build number!


The jahia-impl-*.jar has incorrect build number.


To apply the fix, the default filejahia-impl-*.jar must be present with the correct build number.
If the customer has the correct jar available, replace the existing one in WEB-INF/lib/ with it. Else do a fresh install of required version and copy the jar generated.