I attached bdm install error and bpm services error log files.
I am using 7.6.3 community version. I stopped bpm services, backup databases and platfrom then started to migrate. I did everything what https://documentation.bonitasoft.com/bonita/7.7/migrate-from-an-earlier-version-of-bonita-bpm page says and complated database migration without error. But when i am trying to resume bpm services i get error.
And also i've tried to install bdm again but i got diffirent error while trying to install bdm again. I am not sure but it could be a bug because i thing there are extra tables and columns in latest database and these extras not compatible for migration.