Plc startup is: forbidden

Hello,
we have had a failure with the AXC F 2152 a few days ago. We use the controller as a gateway between Profinet and Modbus. After a restart of the controller the connection is not established anymore. The controller is stopped. A connection to the controller via PLCnext Engineer was no longer possible. Via the web interface I got the following notification. Can someone help me there? Thanks.

SystemManager,Arp.System.Acf.SystemManager.StateChanged,SystemManager state changed: Running, error=false, warning=false,default

Device interface,Arp.Device.Interface.EthernetLinkStateChanged,Link state changed: interface 1, port 2, status: Up,default

SystemManager,Arp.System.Acf.SystemManager.StateChanged,SystemManager state changed: Stop, error=false, warning=false,default

PLC,Arp.Plc.Domain.PlcManager.StateChanged,Plc state changed: None ==> Ready (error),default

SystemManager,Arp.System.Acf.SystemManager.StateChanged,SystemManager state changed: Ready, error=false, warning=false,default

SystemManager,Arp.System.Acf.SystemManager.StateChanged,SystemManager state changed: None, error=false, warning=false,default

SystemManager,Arp.System.Acf.SystemManager.Startup,System starting up. Firmware version 2020.3.1 (20.3.1.28622),default

System Manager,Arp.System.Acf.SystemManager.StateChanged,SystemManager state changed: Running, error=false, warning=true,default

PLC Manager,Arp.Plc.Domain.PlcManager.StateChanged,Plc state changed: Stop (warm) ==> Stop (suspended by system watchdog, warm),default

Device Interface,Arp.Device.Interface.EthernetLinkStateChanged,Link state changed: interface 1, port 2, status: Up,default

System Watchdog,Arp.System.Watchdog.WatchdogStatusChanged, system watchdog state changed: new state: UnacknowledgedWatchdog plc startup is: forbidden ,default

System Manager,Arp.System.Acf.SystemManager.StateChanged,SystemManager state changed: Stop, error=false, warning=true,default

PROFINET Controller,Arp.Io.PnC.PnStationStateChanged,Led state changed: Arp.Io.PnC (Controller), BF=Off, SF=On,default

PROFINET Controller,Arp.Io.PnC.ArReady,Connection to device established: xvw02d002,default

PROFINET Controller,Arp.Io.PnC.PnStationStateChanged,Led state changed: Arp.Io.PnC (Controller), BF=On, SF=On,default

PROFINET Controller,Arp.Io.PnC.PnStationStateChanged,Led state changed: Arp.Io.PnC (Controller), BF=On, SF=On,default

PROFINET Controller,Arp.Io.PnC.ArReady,Connection to device with differences established: xvw01d001,default

PLC Manager,Arp.Plc.Domain.PlcManager.StateChanged,Plc state changed: Ready ==> Stop (warm),default

PLC Manager,Arp.Plc.Domain.PlcManager.StateChanged,Plc state changed: ==> Ready,default

PROFINET Controller,Arp.Io.PnC.PnStationStateChanged,Led state changed: Arp.Io.PnC (Controller), BF=On, SF=Off,default

PROFINET Device,Arp.Io.PnD.PnStationStateChanged,Led state changed: Arp.Io.PnD (Device), BF=On, SF=Off,default

System Manager,Arp.System.Acf.SystemManager.StateChanged,SystemManager state changed: Ready, error=false, warning=false,default

System Manager,Arp.System.Acf.SystemManager.StateChanged,SystemManager state changed: None, error=false, warning=false,default

System Manager,Arp.System.Acf.SystemManager.Startup,System starting up. Firmware version 2021.0.5 LTS (21.0.5.35585),default