I've had to not upgrade to v1.6.1 from v1.6.0 because the datetime attribute type in the database won't support dates before 1000 AD. It gives an error that it needs to be greater than 1000 AD.
Is this intended?
TL;DR
Database datetime attribute in version 1.6.1 does not support years before 1000 AD, causing an error. This appears to be unintended and may require a fix in future updates. Developers are advised to stick with version 1.6.0 for now to avoid this issue.