Rewards not appearing

Hello,

Players from my server are reporting issues in receiving wood in cases. You get only first time you get wood, other times you do not get anything when you reward is wood. it started this wipe.
everything is correct:

        {
          "Select reward type: 0 - Item, 1 - Command": 0,
          "Chance of dropping this reward": 70,
          "The displayed chance of getting this reward": 35,
          "PNG for reward (85x85) (if not required - leave blank) (not required for regular items)": "",
          "Item setting (if item type is selected)": {
            "Item name in UI (if left blank, values from lang will be used)": "Wood",
            "Is this a blueprint? true - yes/false - no": false,
            "Shortname item": "wood",
            "SkinID item": 0,
            "Quantity setting (if you need a static value - set both fields to the same value)": {
              "Min amount": 10,
              "Max amount": 200000
            }
          },
          "Command setting (if Command type is selected)": {
            "Item name in UI (if left blank, values from lang will be used)": "",
            "Console command (%STEAMID% - will be replaced by the player's Steam64ID)": "",
            "Seconds. Time for which the reward will be issued - leave 0 if this award is not issued for a while and fill in the field below (only affects the visual display)": 0,
            "Amount. If it is a custom item or a reward that is issued in N quantity (affects visual display only)": 0
          }
        },