User Sync – Skip 2 specific ID's for sync

Hello

I have a special use case where I have 3 user ID’s which have the same email address. I forced the backend to accept the same email for all 3 users.

I am syncing these ID’s along with other ID’s on this site to a subsite. I keep getting a sync error because of these ID’s.

Is it possible to skip the sync for these ID’s?

Best Regards,

Vamsi