Dell s4810p cannot set the management-route

Using this command:

management route X.Y.Z.0 /24 A.B.C.1

in my flat network i'm use management route 10.0.0.0 /24 10.0.0.1(default route)

i've also tried management route 10.0.0.0/24 managementethernet which appears to take but it doesn't show up when during do show run management-route

with the first line it gives error that the ip address is not on the same subnet as the management interface

management is set at 10.0.0.22/24

any help here would be appreciated.

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Thank you