Why is Recommission not working in Cisco UCS?

Question

Cisco

There is some system managed by Cisco UCS.
Initially everything worked.
There are several Rack servers (M220 c3s) with "Discovery Failed" status.
I took the first one.
At first I tried to do Re-acknowledge - it hangs at the Discover Bmc inventory step , error - 1002, Error retrieving server params
Then I performed Decommission and Recommission I
applied the profile, and the Re-acknowledge
Server appeared, everything worked.
Took to treat the second and third.
I do the exact same thing.
However, when I try to execute Recommission , nothing happens.
Tell me what else you can try?)