diff --git a/src/models/RolePlugin.lua b/src/models/RolePlugin.lua
index 42208c7..960030c 100644
--- a/src/models/RolePlugin.lua
+++ b/src/models/RolePlugin.lua
@@ -2788,30 +2788,32 @@ function RolePlugin.bind(Role)
 	end
 
 	local function appendAdvBnous(dstBnous, srcBnous)
-		if not dstBnous and not srcBnous then return end
+		if not dstBnous and not srcBnous then return {} end
+		local result = clone(dstBnous or {})
 		for time, set in pairs(srcBnous) do
-			if not dstBnous[time] then
-				dstBnous[time] = {}
+			if not result[time] then
+				result[time] = {}
 			end
 			for key, value in pairs(set) do
-				dstBnous[time][key] = (dstBnous[time][key] or 0) + value
+				result[time][key] = (result[time][key] or 0) + value
 			end
 		end
+		return result
 	end
 
 	local function appendTableBnous(dstBnous, srcBnous)
-		if not dstBnous and not srcBnous then return end
+		if not dstBnous and not srcBnous then return {} end
+		local result = clone(dstBnous or {})
 		for k, v in pairs(srcBnous) do
-			dstBnous[k] = (dstBnous[k] or 0) + v
+			result[k] = (result[k] or 0) + v
 		end
+        return result
 	end
 	function Role:getBnousAdv()
 		local towerBnous = self:getTowerBnousActive()
 		local levelBnous = self:getLevelBnous()
 		local adv = levelBnous[SystemBnousType.Adv] or {}
-		towerBnous[SystemBnousType.Adv] = towerBnous[SystemBnousType.Adv] or {}
-		appendAdvBnous(towerBnous[SystemBnousType.Adv], adv)
-		return towerBnous[SystemBnousType.Adv]
+        return appendAdvBnous(towerBnous[SystemBnousType.Adv], adv)
 	end
 
 	function Role:getBnousHangTime()
@@ -2825,18 +2827,14 @@ function RolePlugin.bind(Role)
 		local towerBnous = self:getTowerBnousActive()
 		local levelBnous = self:getLevelBnous()
 		local pvpTicket = levelBnous[SystemBnousType.PvpTicket] or {}
-		towerBnous[SystemBnousType.PvpTicket] = towerBnous[SystemBnousType.PvpTicket] or {}
-		appendTableBnous(towerBnous[SystemBnousType.PvpTicket], pvpTicket)
-		return towerBnous[SystemBnousType.PvpTicket]
+		return appendTableBnous(towerBnous[SystemBnousType.PvpTicket], pvpTicket)
 	end
 
 	function Role:getBnousSweep()
 		local towerBnous = self:getTowerBnousActive()
 		local levelBnous = self:getLevelBnous()
 		local sweepReward = levelBnous[SystemBnousType.SweepReward] or {}
-		towerBnous[SystemBnousType.SweepReward] = towerBnous[SystemBnousType.SweepReward] or {}
-		appendTableBnous(towerBnous[SystemBnousType.SweepReward], sweepReward)
-		return towerBnous[SystemBnousType.SweepReward]
+		return appendTableBnous(towerBnous[SystemBnousType.SweepReward], sweepReward)
 	end
 
 	function Role:getBnousDismantlingMaximum()
--
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