While running the below command on Active Directory Domain Controller getting an error issuing replication:8452
repadmin /syncall /AePdq
This issue occurs due to manually created connections as shown below screenshot. You can check this in AD Sites and Services
To resolve this issue, you can remove all the manually created connections and run the below command in admin command prompt on all the Domain Controllers.
Repadmin /kcc *
After running Repadmin /kcc * command new automatically generated connection was created and the issue has been fixed.