remove contraint temporarily

00-tables.sql

@@ -156,7 +156,6 @@ CREATE TABLE collections (
     collection_id     SERIAL        NOT NULL,
     title             VARCHAR       NOT NULL,
     owner_id          VARCHAR       NOT NULL,
-    PRIMARY KEY (collection_id),
-    FOREIGN KEY (owner_id) REFERENCES users (user_id)
+    PRIMARY KEY (collection_id)
 );