# X_EXERCISE_ACTOR_USER_UNSEATED

## Means

the exercise pass could not seat its actor's x_users row

## Typical cause

x exercise writes one x_users row per actor it acts as (an app on @ultimat3/auth reads ctx.actor.id as one), and the insert was refused — a column the app added to x_users with no default, usually

## Fix

`x exercise --json   # after a migration under packages/db/migrations/ gives the column the app added to x_users a default, or makes it nullable`

[Testing](/error-codes#testing)