ahsanshah opened a new issue #4419: Unclear on how to migrate metadata across 
Superset versions
URL: https://github.com/apache/incubator-superset/issues/4419
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   ### Superset version
   ### Expected results
   ### Actual results
   ### Steps to reproduce
   Hi All,
   I am a bit confused on how you can "migrate" metadata (dashboards, reports, 
UI content) from one version of Superset to another?  I tried the following:
   1.  Upgrading the superset db upgrade on a v19.0 version of superset and 
copy the file to a v22 version.
   2.  Tried the Import/Export feature...ERRORs out on a pickle error even 
though my data source was properly defined.
   So my questions are:
   1. How do we migrate content across versions?  We currently use Docker 
images so this is very relevant that we can do a clean build versus an in-place 
upgrade.  As our content grows we cannot "redo" everything and we certainly 
want to be agile in using newer releases.
   2.  Would moving from sqllite to mySQL make this more standard as a 
"central" metadata store?  How do upgrades work if we do this?  We plan to move 
to mySQL eventually but want to confirm.
   Any thoughts here are appreciated.

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