graceguo-supercat edited a comment on issue #9593:
URL: 
https://github.com/apache/incubator-superset/pull/9593#issuecomment-617403447


    `it doesn't throw errors` is not good enough. Dashboard will _persist_ some 
information in its metadata, default_filters, layout, filter scopes., etc into 
**dashboards** table. For example, a chart was a filter with filter but then it 
became non-filter chart...then how about those persisted metadata? For the long 
term it will cause data quality issue and many potential bugs. 


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