Update version of production engine, from 7.3.3 to 7.5.4

I have in my production engine version 7.3.3 of BonitaSoft installed, I would like to know the best way to upgrade to version 7.5.4? Any hint of material to get an idea of where to start would be welcome

There is a documentation page that explains how to migrate a Bonita server from one version to another.

Most important highlight is, as for any migration, to first fully backup your installation (file system and database).

How can I check if the production engine has updated correctly? This message is being displayed, “The elements you try to display can’t be retrieved due to a server problem.
Please contact your administrator.”. And I can no longer import any .bar files

even seeming to upgrade the Bank I can not tell if it worked with the portal because I can not add more processes to it.

Link 01
Link 02

I checked and the portal version did not really change even though I ran the migration tool

[Portal]
[Portal]: https://drive.google.com/file/d/1R7WHnSI5H3wdSjYjnYuATbm4ByUA2Bp-/view?usp=sharing