It was the only underscore-separated service name across all 38 apps; every
other helper uses a hyphen (nextcloud-db, matrix-postgres, owncloud-mariadb,
gitea-cache, mastodon-redis).
Beyond consistency this closes a naming collision by construction. Instance
slugs are <type>_<id> and may only contain [a-z0-9_] — the underscore is forced
there, because app configs are SOURCED and the uppercased slug becomes part of
CFG_<SLUG>_* variable names, which a hyphen would make invalid shell
identifiers. So a hyphenated helper name is one no slug can ever produce:
bookstack_home-db is unreachable, where bookstack_home_db was a name an
instance literally called "home_db" could also generate.
The four installed Bookstack apps were removed and rebuilt on the new template
(no data worth keeping, per the maintainer). All four are back up and serving
200 on the LAN, and their port rows join correctly to the renamed services.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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