FG generates endless Radius requests, how to stop?

Hi all, My FG50E generates after a unsuccessfull Auth request endless raduis requests (Duplicate Request).

This is done every 5 Seconds.

How can I stop these requests by CLI?

Current OS Version 5.6.3

I'm testing to get SSL-VPN done with Microsoft MFA, SMS Token. This is still not working. the Authentication with the Push notification is working in the meantime.