I produced this error when I clone an item then I delete it.
The problem occurs with frontend 2.0.2 but doesn't occur with frontend 2.0.1.

Tell me if you want more info.
Thanks Alain

Error produced by frontend 2.0.2, the item is deleted but this error appears (supprimé is the french word for deleted, Elément is the french word for item)

Supprimé: Élément "GigabitEthernet0/1-IN" sur "Cisco 2960-24G".
Undefined index: 36094 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36095 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36096 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36097 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36098 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36099 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36100 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36101 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36102 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36103 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36104 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36105 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]
Undefined index: 36106 [items.php:633]
reset() expects parameter 1 to be array, null given [items.php:634]
Undefined index: key_ [items.php:636]
Undefined index: itemid [items.php:636]