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ERROR_MRM_DUPLICATE_ENTRY
ERROR_MRM_DUPLICATE_ENTRY means the resource index contains two entries that resolve to the same resource identity and qualifier set. The index cannot deterministically choose between duplicate definitions.
Trace both definitions back to their source files, resource keys, and qualifiers before deleting either one. The correct fix is to make the resource identities distinct or remove the accidental duplicate at build time.
What to check
- Look for duplicate resource keys generated by source files, linked files, or merged project content.
- Check whether two files encode the same resource name and qualifier combination.
- Remove the duplicate at the build-input level and rebuild the PRI.
Microsoft: Resource Management System and PRI files
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