frontend work

src/backend/Components/Item/ItemManager.ts

                 Object.entries(itemTiers)
                 .map((kv) => Promise.all(
                     kv[1].map(i => this.fetchItem(i)
-                        .then(item => this.admin
+                        .then(item => 
+                            this.admin
                             .knex('items')
                             .insert({
                                 tier: kv[0],
                                 ...item
-                            })
-                    ))
+                            }).catch(() => {})
+                        )
+                    )
                 ))
             )
         }