Did you try to restore backup to a fresh install of version 9 and do upgrade incrementally? I did try to upgrade from v8 to v11 back then in this thread Upgrade from v8 to v11 - #6 by lasalesi
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Did you try to restore backup to a fresh install of version 9 and do upgrade incrementally? I did try to upgrade from v8 to v11 back then in this thread Upgrade from v8 to v11 - #6 by lasalesi