This particular error means that we're unable to sync a HubSpot contact because the corresponding lead or contact has been deleted in Salesforce. The error is harmless in that it does not prevent any data from syncing, but is a good indication that HubSpot and Salesforce might become out of sync over time.
To fix this, navigate to the contact in HubSpot that is not syncing to Salesforce. Scroll until you see the Salesforce Sync section on the left-hand side of the contact record. You'll see a message here indicating that this contact is no longer syncing with Salesforce. Click Resync to attempt to sync the contact. If a corresponding record is not found in Salesforce, HubSpot will create a new record.
Please note: contacts with this sync error must be resynced one at a time; it is not possible to bulk resync contacts in this state. If you have a large number of contacts with this error that need to be resynced, please reach out to HubSpot support for assistance.
To prevent this from happening in the future:
- In your HubSpot account, click your photo or avatar in the top right-hand corner, then click Integrations.
- Next to the Salesforce integration, click Settings.
- Scroll down to Deleting Contacts from HubSpot and select the appropriate checkboxes.