After unasigned ip adress it's impossible to connect to AXCF2152

Hello,
In PLCnext Engineer, I try to unasigned address via Project view. And now my station has no more IP addess (quite normal), but if I try to apply the project setting to online Device, it’s impossible to change parameters of PLC (my PLC has no more IP address). So I can’t connect. Do you have a solution ?
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