en January is not after itself Z16650
en Test case

߁߇:߄߆, ߃ ߥߊ߬ߛߌ߬ߥߙߊ ߂߀߂߄ ߟߊ߫ ߡߊ߬ߦߟߍ߬ߡߊ߲߬ߠߌ߲ ߕߊ߬ߡߌ߲߬ߣߍ߲

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@@ ߛߌ߬ߕߊߙߌ ߂߅: / ߛߌ߬ߕߊߙߌ ߂߅: @@
             "Z844K2": {
                 "Z1K1": "Z40",
-                "Z40K1": "Z41"
+                "Z40K1": "Z42"
             }
         }