# X_DRIVER_UNSUPPORTED

## Means

a custom driver was asked for a capability it does not declare

## Typical cause

defineDriver({ capabilities }) omits the capability the call needs (meta.capability): transactions, lock, series, upsert, matches or aggregate:<kind>

## Fix

`implement the method on the raw repo and add its name to capabilities in defineDriver({ … }), or run that call on postgresDriver()`

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