I call update() to populate analysis descriptions, from a script `ensembl_genomes/eg-pipelines/scripts/production_db/analysis_desc_from_prod.pl`. I found this when I was searching why `analysis_description.web_data` wasn't populated in WormBase ParaSite. Ensembl probably populates `analysis_description.web_data` differently, and has it working.

 As far as I see the code has been like that for a long time (2 years?), and there's some special behaviour and disclaimers about this field which I don't understand. I also don't really understand the consequences of making the column populated again. So I'm calling it a feature instead of a bug.

@nerdstrike you might know what to do with it!