Error Code Portal
MicrosoftWindows Win32Error code

8508

ERROR_DS_NONSAFE_SCHEMA_CHANGE

Alternative forms: 0x0000213C · 0x213C · ERROR_DS_NONSAFE_SCHEMA_CHANGE · 0x8007213C

What does this code mean?

Code 8508 · An issue reported by Windows Win32.

Official explanation · Original text

Adding a new mandatory attribute to an existing class, deleting a mandatory attribute from an existing class, or adding an optional attribute to the special class Top that is not a backlink attribute (directly or through inheritance, for example, by adding or deleting an auxiliary class) is not allowed.

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

System Error Codes (8200-8999) (WinError.h) ↗

Creator: Microsoft and MicrosoftDocs contributors
License: Creative Commons Attribution 4.0 International
Checked on: 2026-11-12

Modifications: Extracted numeric codes, symbolic names and English message text; converted Markdown/HTML to plain text and normalized whitespace; added Korean product context, namespace labels, status classification and separately labeled official links. No machine translation of message text.

Source details · Original licenses and notices