Multiple columns with PRIMARY KEY constraint

#1

I was using the UI to create a table. I added a single id field – UUID and I got this error…

Application/Schema.sql:46:3:
   |
46 | );
   |   ^
Multiple columns with PRIMARY KEY constraint

I cannot make any changes using the schema designer. I only see the above error.

When I go to the code editor I see this…

CREATE TABLE user_games (
    id UUID DEFAULT uuid_generate_v4() PRIMARY KEY NOT NULL,
    id UUID DEFAULT uuid_generate_v4() PRIMARY KEY NOT NULL
);

However, when I remove that extra id field or change it to something else, or just delete the CREATE TABLE command all together and then click Save, it just reverts back. No changes are saved and I still have the error.