Hello, friend!
When creating a service port, you can specify the index value for the index parameter. If this parameter is not specified, the system automatically allocates an idle index.
According to your description, the index values of service ports 1 to 70 should have been used. To change the index value of service ports to a value smaller than 70, you need to delete one of service ports 1 to 70.
To delete a service port based on the index, run the following command:
undo service-port index
Run the service-port command to re-create the service port whose index is smaller than 70.
Thanks!