First fit a bigger turbo and tune the boost control.
Your boost request is fine, your boost control isn't.
There's no point to run more than 1.5 bar on K04.
I've since dialled in the pid somewhat since the the log above but could still do with some work.
Reason for the interest in 5120 is a bigger turbo i will be fitting so this would be useful to keep things oem as possible with regards to the same tuning practises instead of driving duty with drl for example.