WAF no longer working after backup XG and then restore to XGS

Question

Good morning community, I have a problem with WAF after a migration from XG230 to XGS2300. 
 It was a XG230 HA cluster which I disbanded before the backup and only backed up one firewall. 
 I imported this backup into a new XGS2300 and again formed a new HA cluster. 
 I have now noticed that no web publishing rule is working. VPN and outgoing rules are working. 
 What did I do wrong here? Surely this can't be that I can't just import the backup of an XG into an XGS? The firmware is of course identical on all systems. 
 Best regards Michael

Vivek Jagad · Answer

Hello Michael Großmann ,

Thank you for reaching out to the community, may we know the firmware on XG 230 to XGS 2300 ?
As there has been a known issue where WAF might stop working after restoring a backup - NC-87676

Would suggest you to lock a support service request !

Hardik_R · Answer

Hello Michael Großmann The error " Invalid encrypted key" indeed related to NC-87676, please check tonight and if it still does not work then raise support ticket. root cause here is the database corruption for WAF profile/signature which is not being decrypted and hence does not allow reverse proxy service to start.

Vivek Jagad · Answer

And this to add on to what Hardik_R said, this might be a corruption too due to backup workflow, this is fixable with the help of support.