Error when try to upgrade from 7.3 to 8 ...

[overcloud-Networks-xpykwqju64xm-ExternalNetwork-u4ia45stj7az]: UPDATE_FAILED Conflict: resources.ExternalSubnet: Unable to complete operation on subnet 6f04162b-f9e4-49bf-b4f3-6850a87da788. One or more ports have an IP allocation from this subnet.
...
[InternalApiSubnet]: CREATE_FAILED BadRequest: resources.InternalApiSubnet: Invalid input for operation: Requested subnet with cidr: 172.17.0.0/24 for network: a178df6b-a137-402e-aee7-bf032024f734 overlaps with another subnet.
...
[overcloud-Networks-xpykwqju64xm-InternalNetwork-etszwt64ha3w]: UPDATE_FAILED BadRequest: resources.InternalApiSubnet: Invalid input for operation: Requested subnet with cidr: 172.17.0.0/24 for network: a178df6b-a137-402e-aee7-bf032024f734 overlaps with another subnet.
[overcloud-Networks-xpykwqju64xm-StorageNetwork-5umrogrmwj4n]: UPDATE_FAILED Conflict: resources.StorageSubnet: Unable to complete operation on subnet 64d97fc9-e7dd-4283-9ecd-384fc7c6eb23. One or more ports have an IP allocation from this subnet.
[overcloud-Networks-xpykwqju64xm-TenantNetwork-m2z6odoiumuj]: UPDATE_FAILED Conflict: resources.TenantSubnet: Unable to complete operation on subnet 717ba356-eba5-4da8-8199-2bf854dc8b70. One or more ports have an IP allocation from this subnet.
[InternalNetwork]: UPDATE_FAILED resources.InternalNetwork: BadRequest: resources.InternalApiSubnet: Invalid input for operation: Requested subnet with cidr: 172.17.0.0/24 for network: a178df6b-a137-402e-aee7-bf032024f734 overlaps with another subnet.

$ neutron subnet-list
+--------------------------------------+---------------------+----------------+----------------------------------------------------+
| id | name | cidr | allocation_pools |
+--------------------------------------+---------------------+----------------+----------------------------------------------------+
| bc17f199-b4c6-4f74-8ebe-5c24afc2e25c | storage_mgmt_subnet | 172.19.0.0/24 | {"start": "172.x.0.10", "end": "172.x.0.200"} |
| 717ba356-eba5-4da8-8199-2bf854dc8b70 | tenant_subnet | 172.17.0.0/24 | {"start": "172.y.0.10", "end": "172.y.0.200"} |
| 6f04162b-f9e4-49bf-b4f3-6850a87da788 | external_subnet | 203.0.113.0/24 | {"start": "203.g.z.100", "end": "203.g.z.140"} |
| 64d97fc9-e7dd-4283-9ecd-384fc7c6eb23 | storage_subnet | 10.10.103.0/24 | {"start": "10.10.103.10", "end": "10.10.103.200"} |
| 60f3daaa-56c7-40a0-87dc-fd0f966e9875 | tenant_subnet | 172.16.0.0/24 | {"start": "172.16.0.10", "end": "172.16.0.200"} |
| 41b22d25-e87d-4e42-a372-14fbb06319ae | storage_subnet | 172.18.0.0/24 | {"start": "172.18.0.10", "end": "172.18.0.200"} |
| 3cc0d8f0-06fc-4b49-a4bb-f04c5845608e | management_subnet | 10.0.1.0/24 | {"start": "10.0.1.4", "end": "10.0.1.250"} |
| fb8b6b6d-bb38-4c8f-bc50-ac305683fd8b | | 10.0.0.0/24 | {"start": "10.0.0.100", "end": "10.0.0.200"} |
+--------------------------------------+---------------------+----------------+----------------------------------------------------+

I'm not sure where is define file for neutron subnet...I'm not deploy this installation of Openstack.

Someone could you help me for create a command for correct upgrade?
I'm block at par. 10.4 guide https://access.redhat.com/documentation/en/red-hat-openstack-platform/version-8/director-installation-and-usage/#sect-Major-Upgrading_the_Overcloud

Thanks in advance
Andrea.