Dealing with topology data corruption on upgrade to 3.6.0

[Sandro Santilli]

The 3.6.0 release introduced a bug that results in data corruption:
https://trac.osgeo.org/postgis/ticket/5983

This means that whoever upgraded to 3.6.0 while having topology data is
now in a data-corruption state and any update to their data will
make the situation worse beacuse they would end up with a mix of valid
and invalid rows.

It would be nice if the proponent of the change which introduced the
problem (in Cc) would partecipate in the effort of providing a fix for it,
and I hope we won't repeat the mistake of accepting contributions before
all issues raised during review are addressed [1]

[1] https://gitea.osgeo.org/postgis/postgis/pulls/242#issuecomment-13471

I think this should be announced to the users because as the damage could
be mitigated by restoring a backup into a 3.5.x version until we find
a solution.


--strk; 

  Libre GIS consultant/developer 🎺
  https://strk.kbt.io/services.html
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