fix

sql/migrations/000001_init.up.sql

@@ -54,7 +54,7 @@ CREATE TABLE users (
 
 CREATE TABLE studios (
     id                  bigint              GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
-    studio_name         text                UNIQUE,
+    studio_name         text                NOT NULL UNIQUE,
     illust_id           bigint              REFERENCES images (id),
     studio_desc         text
 );