Database tables missing from data source "W0380" in Appian Community Edition environment

Certified Associate Developer


Environment: Appian Community Edition — Site "W1423AIS Acme IT"
Data Source affected: W0380 Data Source (MariaDB)
Description:
I am experiencing errors indicating that multiple tables are missing from my "W0380" data source, which I did not delete or modify manually.
Errors observed so far:

On the "W0380AS Vehicle" record type:

"The configured database table is invalid. The AS_VEHICLE table does not exist in the configured data source. Change the database table to continue."


Key details:

I log into this environment regularly; my last login before noticing this issue was about one week prior.
I did not perform any manual deletions, renames, or schema changes on these tables.
The issue appears to affect more than one table within the same data source (W0380), suggesting a possible environment-wide database issue rather than an isolated table problem.

Request:
Please investigate whether the underlying database for this Community Edition environment was reset, migrated, or otherwise affected, and advise whether the missing tables/data can be restored.
I'm happy to provide additional screenshots or details as needed

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