Use trail_subsystem_id?

[versatilehuman]

fpdcc/trailsyserver#27

[gisdevcc]

This was done in 2019 with fpdcc/trailsyserver@03187ac

However, I noticed that there is some clean up that needs to happen with older alerts in production that were created before this change.

[versatilehuman]

@gisdevcc Looks like this one?

[gisdevcc]

@versatilehuman That one looks okay to me. What is wrong with it?

[versatilehuman]

@gisdevcc I think I'm not understanding what "older alerts in production that were created before this change" means. We can discuss next call? This one isn't urgent.