# X_ENTITY_SERIES_UNSUPPORTED

## Means

a repository has no series

## Typical cause

db.<table>.series() was called on a hand-written Repo that does not implement it

## Fix

`database(entities, { driver: postgresDriver() }) — the shipped drivers both answer series; a hand-written Repo implements it`

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