Azure AD connector : Error : Unable to update the specified properties for on-premises mastered Directory Sync objects or objects currently undergoing migration

Hello,

We have a synchronization project with an Azure AD tenant.

In the same time, we launched a project to migrate Exchange on-premise users to Exchange online.

We are using Ad connect synchronisation.

The users are created first in One identity manager, then AD connect is used to push the necessary fields from AD to Azure AD.

Once a user has ben migrated, when we update Azure AD fields like (DisplayName , UPN etc )it in One identity manager, there is an error like this :

ErrorMessages (2022-09-21 07:17:12.020) [1777018] Error executing synchronization project (Azure Active Directory tenant 'XXXXXX)'s workflow (Provisioning).
[1777124] Error executing projection step (User) of projection configuration (Provisioning (Provisioning)).
[1777219] Error executing synchronization step (User)!
[1777004] Method (Update (Update)) could not be executed successfully.
[System.Exception] [Exception]: ServiceException occured
Code: Request_BadRequest
Message: Unable to update the specified properties for on-premises mastered Directory Sync objects or objects currently undergoing migration.
[ServiceException]: Code: Request_BadRequest - Message: Unable to update the specified properties for on-premises mastered Directory Sync objects or objects currently undergoing migration.

[System.Exception] ServiceException occured
Code: Request_BadRequest
Message: Unable to update the specified properties for on-premises mastered Directory Sync objects or objects currently undergoing migration.
[Microsoft.Graph.ServiceException] Code: Request_BadRequest
Message: Unable to update the specified properties for on-premises mastered Directory Sync objects or objects currently undergoing migration.

Deos this means that we can no longer use the connector to update the users from One identity manager..

Is there  any solution ?

Have anyone else faced this problem and what to do to give One identity priority in synchronisation over AD connect ?

Thank you for your help