# X_STATE_UNDECLARED

## Means

that column declares no state machine

## Typical cause

`transition()` on a column with no `.transitions()` — a declaration bug and not a caller's, which is why `cause` lists the columns that DO declare one: the repair is naming a different column or writing the table, and both are edits to source. 500, the same shelf as `X_SEARCH_UNDECLARED`

## Fix

`add .transitions(…) to <entity>.<column>` — it must be an `enumerated()` column, and every value that set declares needs an entry. When other columns already declare a machine, the `fix` lists those instead

[Entity and database](/error-codes#entity-and-database)