[Need Help] FCS Error

Dears

I Faced problem FCS error on many Routerboard and links

It’s not fair , because is see ether running but FCS counter increase, until disable ethernet and enable to solve this issue

I change :

1-Cable
2-power Injector
3-RB


I turn off auto-negotiation not solved
I mark just 100M not solved
i turn on rx-flow-control not solved

it’s repeat more than 30 times in day

Please can any one help me
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FCS errors are caused by bad cables, bad cable installation, or a failing port. Check the cable and the device at the other end.