Duplicate Bridge ID KVM

Hi
I have realized once I finish creating the bridges , duplicated bridge IDs appear on

brctl show

bridge name  bridge id           STP enabled  interfaces
br10         8000.00505636bba0   no           bond0.10
br20         8000.00505636bba0   no           bond0.20

tested on RHEL 7.2 & 7.4

I have tired to set up the MAC addresses manually on

ifcfg-bond0.10

ifcfg-bond0.20

1- Now my concern: if that is the right modification need to be done or different action ?

2- What is the difference between adding

MACADDR

HWADDR

3- Will this affect the routing meaning there will be multiple VMs running with multiple interfaces on them ?

4- When do we need to enable STP noting these servers are connected to upstream Switches which they should manage the STP ?

Thanks in advance and apologies for the long list questions