After attempting to remove a Discogs URL via the new entity fields ("External Links") on the Edit Release page:
Relationship: Stain  by Living Colour  has a Discogs page at http://www.discogs.com/release/1338864 [info] "
I get the following error (see attachment):
"Failed query: 'SELECT 1 FROM editor WHERE id = ? FOR UPDATE' (328771) DBD::Pg::st execute failed: ERROR: current transaction is aborted, commands ignored until end of transaction block at lib/Sql.pm line 107, <$fh> line 1..."
Perhaps relevant: I re-added the same URL as a new entity in the same editing session (I mistakenly thought the one I was removing was for a different edition).