Windows error 8375 (ERROR_DS_CANT_DEL_MASTER

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: A master cross-reference object cannot be deleted directly.

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ERROR_DS_CROSS_REF_EXISTS	ERROR_DS_SUBTREE_NOTIFY_NOT_NC_HEAD

ERROR_DS_CANT_DEL_MASTER_CROSSREF

ERROR_DS_CANT_DEL_MASTER_CROSSREF (8375) is an Active Directory Domain Services error. The operation tried to delete a crossRef that represents a master naming context. Such objects describe directory partitions and cannot be removed while the corresponding writable partition still exists.

What to check

Identify the naming context and the servers that host writable replicas of it.
Use the supported partition, domain, or application-directory-partition removal workflow.
Confirm replication health before and after topology changes.

Useful command

repadmin /showrepl * /csv

Microsoft: Diagnose AD replication failures · Microsoft: Demote domain controllers and domains · Microsoft: Directory Service system error codes

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