# What this PR does
- patch recent migration files which drop several deprecated DB columns
which led to a recent (minor/internal) issue
- add a CI job to prevent this from happening in the future and instead,
force folks to drop columns [the _proper_
way](https://github.com/grafana/oncall/tree/dev/dev#removing-a-nullable-field-from-a-model)
(which we have documented internally)
(as documented
[here](https://github.com/grafana/oncall/tree/dev/dev#removing-a-nullable-field-from-a-model),
I have the four additional migration files (which actually do the `DROP
COLUMN`s in the db) saved locally, and will include these in a separate
PR/release)
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] Added the relevant release notes label (see labels prefixed w/
`release:`). These labels dictate how your PR will
show up in the autogenerated release notes.
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