Applying CU with Azure SQL

I have a database on SQL Azure with a CU4, and i want to apply the Cumulative Update 6
When i open the database with the dev environement (in order to convert it), i have this message :

The xxx database on the xxx server must be converted before you can use it with this version of Microsoft Dynamics Nav Development Environment.
You must convert the database before it is deployed to a SQL Azure Server


How i deploy my CU ?
I try with 'Invoke-NavDatabaseConversion', but with no success
(and i do not want to retrieve the database in my local server, convert it and send it again ...)