DC GUID mismatch

Hello Everyone

I did the transition from windows server 2003DC to Windows Server 2012 R2 DC.

In windows server 2003 i was having issues with DNS as earlier admin made many changes
which i am not aware also he renamed the domain controller. my GPOs were taking 2 to 3 reboots to apply the policy and we dont have any issue with network bandwidth.

I decommisoned windows server 2003 DC, i have removed all entries in DNS and in active directory
sites and services, i have deleted the computer account.

i have deleted all the entries of domain controller in adsiedit
DC=ForestDNSZones, DC=mydomain,DC=com &
DC=DomainDNSZones, DC=mydomain,DC=com

i have installed windows server 2012 DC with same old host name and same old ip

after that i am facing issue with mismatch in Domain Controllers GUID
The guid shown in the CNAME record in the DNS _msdcs.mydomain.com is 
f08fa46c-81f6-43fb-a3fb-a3fb-beff3a589c6e_msdcs.mydomain.com

The guid show in Active Directory Sites & Services(NTDS Settings) is 
f08fa46c-81f6-43fb-a3fb-a3fb-beff3a589c6e_msdcs.mydomain.com

but when i use the DSquery Command i am getting different GUID
dsquery * "cn=dc-01,ou=domain controllers,dc=domain,dc=local" -scope base -attr objectguid
(2a9bF6c5-8856-BBOE-39291171BCOD)