[postgis-tickets] [PostGIS] #5237: postgis_extensions_upgrade fails with ERROR: there is no unique or exclusion constraint matching the ON CONFLICT specification

[PostGIS]

#5237: postgis_extensions_upgrade fails with ERROR: there is no unique or
exclusion constraint matching the ON CONFLICT specification
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  Reporter:  robe     |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.3.2
 Component:  postgis  |    Version:  3.3.x
Resolution:           |   Keywords:
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Comment (by strk):

 PostGIS 3.1.1 did create a primary key on SRID column of spatial_ref_sys:

 https://git.osgeo.org/gitea/postgis/postgis/src/tag/3.1.1/postgis/postgis.sql.in#L1966-L1973

 Can any of our bots reproduce this ?
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5237#comment:3>
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