lars-erik
Pretty sure the recommendation was to upgrade to sme 7.6 before upgrading to sme 8 or sme 9. There are differences between 7.5.1 & 7.6 that were significant.
You should also remove (delete or move) custom templates and user custom templates either on the sme 7 box before doing the backup, or on the sme 9 box after doing the restore & then do
signal-event post-upgrade
signal-event reboot