Using two columns as primary keys

[MagiPrince]

Hi everyone,

I'm working with a simple database that uses two columns as primary keys for my table :

CREATE TABLE "exchange_rates" (
    "currency_name" VARCHAR(255) UNIQUE NOT NULL,
    "year_of_exchange" INT UNIQUE NOT NULL,
    "usd_exchange" NUMERIC NOT NULL,
    CONSTRAINT "exchange_rates_id" PRIMARY KEY ("currency_name", "year_of_exchange")
);

But when I try to create an element in this table from the motor-admin UI, it returns me the following error :

Unknown primary key for table exchange_rates in model ExchangeRate.

Are the use of two columns as primary keys not supported by motor-admin, as it works just fine when creating directly the element inside the db, or I am missing something ?

Thanks !