Can't extract a master key error

[Andrew Willerding]

I have never come across this error before.

2020-02-05,18:45:23:149,ERROR,[http-nio-8080-exec-468],app,4FA39E6D::Database 
save error->->[v.4.1.RC2 Oct 25 2019 07:58:09] Can't extract a master 
key. Missing key (id), master ID (<ObjectId:Address, 
TEMP:000001BDF4F9150A>)**Exception==>org.apache.cayenne.CayenneRuntimeException: 
[v.4.1.RC2 Oct 25 2019 07:58:09] Can't extract a master key. Missing key 
(id), master ID (<ObjectId:Address, TEMP:000001BDF4F9150A>)

What does it mean and how do I correct for it?

Thanks,

Andrew