W: Failed to fetch [..] The following signatures were invalid: [..]

[Adam Cecile]

Hello,

Since I upgraded to Stretch I get the following warning when running apt 
update:
W: Failed to fetch 
http://archive.cloudera.com/cdh5/debian/jessie/amd64/cdh/dists/jessie-cdh5/InRelease 
The following signatures were invalid: 
F36A89E33CC1BD0F71079007327574EE02A818DD

The sources.list entry is:
deb [arch=amd64, trusted=yes] 
http://archive.cloudera.com/cdh5/debian/jessie/amd64/cdh jessie-cdh5 contrib

Problem is that the key is trusted, so I guess the warning comes from 
something else but I don't know why. I'd like to understand from where 
it comes and how to kill this warning (triggers apt warnings in 
monitoring system).

Thanks in advance,

Regards, Adam.