NIOS II Cyclone V GX Clock

hello,

I am looking to change the default frequency of the NIOS. Usually, this clock is at 50MHz, but I would like to change it.
First I chose to use a clock created by a PLL, then I tried to put a 125MHz clock available.

But I couldn't manage to make it run. The eclipse software tells me that there is a problem with the ELF file. But I have specified on the QSYS platform the value of the known clock.

I tried to modify it by all the means I know but impossible...

Could you please tell me how I can do this?

Thank you very much

CHARLES Antoine