Hi Veolia team,
The migration of the old databases to the new h2, should happen automatically after the first start of Pulse at the end of the installer.
When you say Pulse runs perfectly after the upgrade, when you opened the Web client, Did you have to go through the set up wizard?
Were the instance settings in Pulse available after the upgrade or were they blanked?
If the instance settings were there, it means that the migration to the new database happened.
Could you please check the size of the old databases (in red) compared to the new one (in blue), it should be at least twice as big as the sum of the 2 old databases: