Fix uniqueness constraint in app passwords table

Fixes #688

migrations/schema.sql

@@ -219,7 +219,7 @@ CREATE TABLE IF NOT EXISTS notifications(
     message TEXT,
     acknowledged BOOLEAN DEFAULT false,
     creationTime TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
-
+    UNIQUE KEY appPasswords_name_appId_identifier (name, userId, identifier),
     PRIMARY KEY (id)
 );
 
@@ -231,7 +231,7 @@ CREATE TABLE IF NOT EXISTS appPasswords(
     hashedPassword VARCHAR(1024) NOT NULL,
     creationTime TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
     FOREIGN KEY(userId) REFERENCES users(id),
-    UNIQUE (name, userId),
+
     PRIMARY KEY (id)
 );