Which action removes the [[crm_deleted]] flag from a prospect record?

The [[crm_deleted]] flag is a system field that indicates whether a prospect record has been deleted in Salesforce. The only action that removes this flag from a prospect record is undeleting the record in Salesforce. Re-submitting a form by a prospect, unchecking “CRM Deleted” on the prospect record, or removing the prospect from the Marketing Cloud Account Engagement recycle bin will not remove the flag, as the prospect will still be deleted in Salesforce2. References: 2: [System Fields]