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SQL Server error code

SQL Server error 5229

SQL Server raises error 5229 at severity 16, which marks a problem with the query or data that you can correct.

Table error: Object ID %d, index ID %d, partition ID %I64d, alloc unit ID %I64d (type %.*ls) contains an anti-matter column, but is not a nonclustered index.
Msg5229
NameDBCC4_ANTIMATTER_IN_HEAP_OR_CLUSTERED_INDEX
Severity16
Group5000–5999

What it means

A heap or clustered index contains an antimatter column, but should not.

Source: Database Engine events and errors