Hello,
I have actually upgraded my SCCM version from 2103 to 2107.
Now, I have only a package stuck "In Progress" with this message in distmgr.log :
"Package E0100004 does not have a preferred sender"
I tried to Update distribution point on the package, but nothing changed.
Furthemore, I can not even delete this package. It is the package of the Configuration Manager client.

Thank you for your help !
I have actually upgraded my SCCM version from 2103 to 2107.
Now, I have only a package stuck "In Progress" with this message in distmgr.log :
"Package E0100004 does not have a preferred sender"
I tried to Update distribution point on the package, but nothing changed.
Furthemore, I can not even delete this package. It is the package of the Configuration Manager client.

Thank you for your help !