The Xperia Z1 Compact was the first handset to be updated to firmware build 14.2.A.1.142, however it had a limited rollout. The same situation appears to be the case for the Xperia Z1 (C6903), where build number 14.2.A.1.142 is now rolling out to Telekom Deutschland customers. It appears to be a bug-fixing update over the previous 14.2.A.1.136 update, with no noticeable changes. We don’t expect this update to see a wider release.
Via XDA-developers.