Sync calls receiving SF|Extension items without 004 encryption applied

[jonhadfield]

When making sync calls to the API, I'm receiving a number of SF|Extension type items without items_key_id.
Are these not encrypted?

{"uuid":"0d099660-e7d6-460e-8a93-9f386e7ef6be","duplicate_of":null,"items_key_id":null,"content":"000eyJuYW1lIjoiT25lRHJpdmUg....WRfYXQiOiIyMDIxLTA0LTA3VDEyOjM0OjQzLjU5OFoifX19","content_type":"SF|Extension","enc_item_key":null,"auth_hash":null,"created_at":"2021-04-07T12:34:43.597000Z","updated_at":"2021-04-07T12:34:43.778097Z","deleted":false}

Note: This is after a backup and restore of data to ensure everything is 004.

[atmoio]

SF|Extension are server items that are not meant to be encrypted (this is what the "000" prefix signifies). They apply to both SF|Extension and SF|MFA. The "SF" prefix is also reserved for server-side extensions.

However these two extensions will be replaced by native settings on the server side instead in upcoming server releases.

[jonhadfield]

Makes sense. Thanks for the explanation.