Some older models of Apple Watches are facing issues with updates, preventing users from syncing with their iPhones. It seems to be an inadvertent error by Apple affecting Apple Watch Series 4, Series 5, and original SE models. Users are unable to upgrade to watchOS 10.6.1, missing out on essential security and feature enhancements. This also hinders the pairing and syncing of affected Apple Watches with iPhones running watchOS 10. The problem is likely due to an update requirement change by Apple, causing compatibility issues. Apple is expected to address this issue soon, providing a solution for affected users eagerly awaiting a fix.