Upgrade clients to 12.1.5 : Clients decided to reject the upgrade

Hi,

I've got the known message "Client has decided to reject the upgrade".

I can't find any solution.

Under "my company" folder in clients tab, I created subfolders x64 & x86 to push distinct updates (12.1.5 64 bits & 32 bits).

Some clients had accepted the update, others no.

On computer clients which reject the update, the SEP_INST.log is no modified.

Thank you

Regards