diff --git a/parts/data.lua b/parts/data.lua
index c7dc7ad2..9f044b46 100644
--- a/parts/data.lua
+++ b/parts/data.lua
@@ -127,7 +127,7 @@ function DATA.pasteBoard(str)-- Paste [str] data to [page] board
         p=p+1
     end
 
-    return true, F, #str>lineLimit*10
+    return true,F,#str>lineLimit*10
 end
 
 --[[
@@ -213,25 +213,12 @@ end
 function DATA.pasteQuestArgs(str)
     if #str<4 then return end
     local ENV={}
-    ENV.holdCount=  str:byte(1)-48
-    if ENV.holdCount<0 or ENV.holdCount>6 then
-        -- hold count invalid
-        if ENV.holdCount>=7 and ENV.holdCount<=9 then
-            -- hold count clearly intended to be a number, set to 6
-            ENV.holdCount=6
-            MES.new('warn',text.customDataInvalidHold1)
-        else
-            -- hold count is a random character, reset to 1
-            ENV.holdCount=1
-            MES.new('warn',text.customDataInvalidHold2)
-        end
-    end
+    ENV.holdCount=  MATH.clamp(str:byte(1)-48,0,26)
     ENV.ospin=      str:byte(2)~=90
     ENV.missionKill=str:byte(3)~=90
     ENV.sequence=   str:sub(4)
-    -- hard coding list of generators because there is no other way to obtain it
-    if not TABLE.find({'bag','bagES','his','hisPool','c2','bagP1inf','rnd','mess','reverb','loop','fixed'}, ENV.sequence) then
-        MES.new('warn',text.customDataInvalidSequence)
+    if select(2,require"parts.player.seqGenerators"(ENV.sequence)) then
+        MES.new('warn',text.invalidSequence)
         ENV.sequence='bag'
     end
     return true,ENV
diff --git a/parts/language/lang_en.lua b/parts/language/lang_en.lua
index 9ff7b6c6..01240ab3 100644
--- a/parts/language/lang_en.lua
+++ b/parts/language/lang_en.lua
@@ -95,13 +95,8 @@ return {
     dataCorrupted="Data corrupted",
     pasteWrongPlace="Did you paste in the wrong place?",
     noFile="File missing",
-    
-    -- data validation for custom game data import
-    customDataInvalidHold1="Invalid Hold queue length in custom mode data. Resetting to 6.",
-    customDataInvalidHold2="Invalid Hold queue length in custom mode data. Resetting to 1.",
-    customDataInvalidSequence="Invalid sequence mode in custom mode data. Resetting to bag.",
-    customDataBoardLineLimit="One or more fields in the data exceeded height limit (126 lines).\nParts exceeding the limit have been removed.",
-    customDataSingleBoardLineLimit="Field data exceeded height limit (126 lines).\nParts exceeding the limit have been removed.",
+    invalidSequence="Invalid sequence mode",
+    tooHighField="Field data exceeded 126 lines abandoned",
 
     nowPlaying="Now playing:",
 
diff --git a/parts/language/lang_es.lua b/parts/language/lang_es.lua
index d8b24870..c3dea60f 100644
--- a/parts/language/lang_es.lua
+++ b/parts/language/lang_es.lua
@@ -94,6 +94,8 @@ return {
     dataCorrupted="Los datos están corruptos.",
     pasteWrongPlace="¿Pegaste en la carpeta correcta?",
     noFile="Archivo no encontrado",
+    -- invalidSequence="Invalid sequence mode",
+    -- tooHighField="Field data exceeded 126 lines abandoned",
 
     nowPlaying="Reproduciendo:",
 
diff --git a/parts/language/lang_fr.lua b/parts/language/lang_fr.lua
index 790bc283..ee49081e 100644
--- a/parts/language/lang_fr.lua
+++ b/parts/language/lang_fr.lua
@@ -95,6 +95,8 @@ return {
     dataCorrupted="Données corrompues",
     -- pasteWrongPlace="Paste at wrong place?",
     noFile="Fichier non trouvé",
+    -- invalidSequence="Invalid sequence mode",
+    -- tooHighField="Field data exceeded 126 lines abandoned",
 
     nowPlaying="En train de jouer :",
 
diff --git a/parts/language/lang_id.lua b/parts/language/lang_id.lua
index 67556668..cb460b02 100644
--- a/parts/language/lang_id.lua
+++ b/parts/language/lang_id.lua
@@ -96,6 +96,8 @@ return {
     dataCorrupted="Data rusak",
     pasteWrongPlace="Apakah Anda menempelkannya di tempat yang salah?",
     noFile="File tidak ada",
+    -- invalidSequence="Invalid sequence mode",
+    -- tooHighField="Field data exceeded 126 lines abandoned",
 
     nowPlaying="Musik:",
 
diff --git a/parts/language/lang_ja.lua b/parts/language/lang_ja.lua
index 8b41329e..d60b75b9 100644
--- a/parts/language/lang_ja.lua
+++ b/parts/language/lang_ja.lua
@@ -96,6 +96,8 @@ return {
     dataCorrupted="データが破損してます",
     pasteWrongPlace="貼り付ける位置を間違っていませんか?",
     noFile="ファイルが見つかりません",
+    -- invalidSequence="Invalid sequence mode",
+    -- tooHighField="Field data exceeded 126 lines abandoned",
 
     nowPlaying="再生中:",
 
diff --git a/parts/language/lang_pt.lua b/parts/language/lang_pt.lua
index 97b93087..22f516cb 100644
--- a/parts/language/lang_pt.lua
+++ b/parts/language/lang_pt.lua
@@ -85,6 +85,8 @@ return {
     dataCorrupted="Data corrompida",
     -- pasteWrongPlace="Paste at wrong place?",
     -- noFile="File not found",
+    -- invalidSequence="Invalid sequence mode",
+    -- tooHighField="Field data exceeded 126 lines abandoned",
 
     VKTchW="Peso de toque",
     VKOrgW="Peso da origem",
diff --git a/parts/language/lang_symbol.lua b/parts/language/lang_symbol.lua
index 350bb6e2..a12810fc 100644
--- a/parts/language/lang_symbol.lua
+++ b/parts/language/lang_symbol.lua
@@ -84,6 +84,8 @@ return {
     dataCorrupted="XXXXX",
     pasteWrongPlace="_?X.",
     -- noFile="File not found",
+    -- invalidSequence="Invalid sequence mode",
+    -- tooHighField="Field data exceeded 126 lines abandoned",
 
     nowPlaying="~:",
 
diff --git a/parts/language/lang_vi.lua b/parts/language/lang_vi.lua
index e2444776..db45bd4e 100644
--- a/parts/language/lang_vi.lua
+++ b/parts/language/lang_vi.lua
@@ -100,6 +100,8 @@ return {
     dataCorrupted="Dữ liệu bị hỏng",
     pasteWrongPlace="Bạn có dán đúng nơi không đấy?",
     noFile="Thiếu tệp",
+    -- invalidSequence="Invalid sequence mode",
+    -- tooHighField="Field data exceeded 126 lines abandoned",
 
     nowPlaying="Đang phát:",
 
diff --git a/parts/language/lang_zh.lua b/parts/language/lang_zh.lua
index aa7a9a78..d3de2f22 100644
--- a/parts/language/lang_zh.lua
+++ b/parts/language/lang_zh.lua
@@ -95,13 +95,8 @@ return {
     dataCorrupted="数据损坏",
     pasteWrongPlace="提醒:可能粘贴错地方了",
     noFile="找不到文件",
-    
-    -- data validation for custom game data import
-    customDataInvalidHold1="自定义模式数据中的 Hold 数量错误。重置为 6。",
-    customDataInvalidHold2="自定义模式数据中的 Hold 数量错误。重置为 1。",
-    customDataInvalidSequence="自定义模式数据中的序列模式不存在。重置为 bag。",
-    customDataBoardLineLimit="数据中一个或多个自定义场地的高度超过限制（126 行）。超出限制的部分已被移除。",
-    customDataSingleBoardLineLimit="数据中自定义场地的高度超过限制（126 行）。超出限制的部分已被移除。",
+    invalidSequence="无效序列模式",
+    tooHighField="超过126行的场地数据已被丢弃",
 
     nowPlaying="正在播放:",
 
diff --git a/parts/language/lang_zh_code.lua b/parts/language/lang_zh_code.lua
index b4e30f24..084a70c8 100644
--- a/parts/language/lang_zh_code.lua
+++ b/parts/language/lang_zh_code.lua
@@ -94,6 +94,8 @@ return {
     dataCorrupted="Error.DataCorrupted();",
     pasteWrongPlace="Error.PasteWrongPlace();",
     noFile="Error.NoFile();",
+    invalidSequence="Error.InvalidSequenceMode();",
+    tooHighField="Error.TooHighField();",
 
     nowPlaying="NowPlaying=",
 
diff --git a/parts/language/lang_zh_trad.lua b/parts/language/lang_zh_trad.lua
index f177e53c..dd2e6d2a 100644
--- a/parts/language/lang_zh_trad.lua
+++ b/parts/language/lang_zh_trad.lua
@@ -95,6 +95,8 @@ return {
     dataCorrupted="數據損壞",
     pasteWrongPlace="提醒：可能黏貼錯地方了",
     noFile="文件未找到",
+    invalidSequence="無效序列模式",
+    tooHighField="超過126行的場地數據已被丟棄",
 
     nowPlaying="正在播放:",
 
diff --git a/parts/player/seqGenerators.lua b/parts/player/seqGenerators.lua
index 0e62a391..6799d3b6 100644
--- a/parts/player/seqGenerators.lua
+++ b/parts/player/seqGenerators.lua
@@ -313,6 +313,6 @@ return function(s)-- Return a piece-generating function for player P
             "No sequence mode called "..s or
             "Wrong sequence generator"
         )
-        return seqGenerators.bag
+        return seqGenerators.bag,true
     end
 end
diff --git a/parts/scenes/customGame.lua b/parts/scenes/customGame.lua
index a127207c..356ed2ec 100644
--- a/parts/scenes/customGame.lua
+++ b/parts/scenes/customGame.lua
@@ -191,7 +191,7 @@ function scene.keyDown(key,isRep)
     elseif key=='v' and kb.isDown('lctrl','rctrl') or key=='cV' then
         local str=sys.getClipboardText()
         local args=str:sub((str:find(":") or 0)+1):split("!")
-        local flagHasBoardWithLineLimit=false
+        local hasTooHighField=false
         repeat
             if #args<4 then break end-- goto THROW_fail
             local success,env=DATA.pasteQuestArgs(args[1])
@@ -211,12 +211,11 @@ function scene.keyDown(key,isRep)
             TABLE.cut(CUSTOMGAME_LOCAL.field)
             CUSTOMGAME_LOCAL.field[1]=DATA.newBoard()
             for i=4,#args do
-                
                 if args[i]:find("%S") then
-                    local success, F, flagBoardLineLimit=DATA.pasteBoard(args[i])
+                    local success,F,hitHeightLimit=DATA.pasteBoard(args[i])
                     if success then
-                        if flagBoardLineLimit then
-                            flagHasBoardWithLineLimit=true
+                        if hitHeightLimit then
+                            hasTooHighField=true
                         end
                         CUSTOMGAME_LOCAL.field[i-3]=F
                     else
@@ -224,8 +223,8 @@ function scene.keyDown(key,isRep)
                     end
                 end
             end
-            if flagHasBoardWithLineLimit then
-                MES.new('warn', text.customDataBoardLineLimit)
+            if hasTooHighField then
+                MES.new('warn',text.tooHighField)
             end
             MES.new('check',text.importSuccess)
             return
diff --git a/parts/scenes/custom_field.lua b/parts/scenes/custom_field.lua
index 426e7e16..76fc86e4 100644
--- a/parts/scenes/custom_field.lua
+++ b/parts/scenes/custom_field.lua
@@ -237,11 +237,11 @@ function scene.keyDown(key)
             end
             str=str:sub(p+1)
         end
-        local success,F, flagBoardLineLimit=DATA.pasteBoard(str)
+        local success,F,hitHeightLimit=DATA.pasteBoard(str)
         if success then
             FIELD[page]=F
-            if flagBoardLineLimit then
-                MES.new('warn', text.customDataSingleBoardLineLimit)
+            if hitHeightLimit then
+                MES.new('warn',text.tooHighField)
             end
             MES.new('check',text.importSuccess)
         else