I can''t change OAM ip  on STX R1.0.

Error Message:

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[wrsroot@controller-0 ~(keystone_admin)]$ system oam-show
+-----------------+--------------------------------------+
| Property        | Value                                |
+-----------------+--------------------------------------+
| created_at      | 2019-07-25T11:24:15.619490+00:00     |
| isystem_uuid    | 103e067c-16c0-43ff-91ea-bea261f33b8a |
| oam_c0_ip       | 10.10.10.3                           |
| oam_c1_ip       | 10.10.10.4                           |
| oam_floating_ip | 10.10.10.2                           |
| oam_gateway_ip  | 10.10.10.1                           |
| oam_subnet      | 10.0.0.0/8                           |
| updated_at      | None                                 |
| uuid            | bd7e48fd-d29e-4ae6-be1f-a45a56250ede |
+-----------------+--------------------------------------+
[wrsroot@controller-0 ~(keystone_admin)]$ system oam-modify oam_subnet=10.0.0.0/8 oam_gateway_ip=10.72.72.1 oam_floating_ip=10.72.72.2 oam_c0_ip=10.72.72.3 oam_c1_ip=10.72.72.4 action=apply
Invalid oam_floating_ip=10.72.72.2. Please configure a valid IP address in range
[wrsroot@controller-0 ~(keystone_admin)]$

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Thanks