The `zerver/0501_delete_dangling_usermessages` was backported to the
`8.x` branch (and the 8.3 release) in 3db1733310. However, because
`main` contained migrations which `8.x` did not, it was backported
with a different `dependencies`:
```
dependencies = [
("zerver", "0496_alter_scheduledmessage_read_by_sender"),
]
```
...as opposed to in `main`:
```
dependencies = [
("zerver", "0500_realm_zulip_update_announcements_stream"),
]
```
This causes upgrades from 8.3 to `main` to fail:
```
django.db.migrations.exceptions.InconsistentMigrationHistory:
Migration zerver.0501_delete_dangling_usermessages is applied before
its dependency zerver.0500_realm_zulip_update_announcements_stream on
database 'default'.
```
Adjust the dependencies in `main` to match those in `8.x` where many
deploys will first have encountered the migration.
Alex Vandiver