diff --git a/frontend/src/i18n/locales/en.ts b/frontend/src/i18n/locales/en.ts
index 0ac93a9811..699cf38de6 100644
--- a/frontend/src/i18n/locales/en.ts
+++ b/frontend/src/i18n/locales/en.ts
@@ -2407,8 +2407,8 @@ export default {
       deleteError: 'Failed to delete channel',
       nameRequired: 'Please enter a channel name',
       duplicateModels: 'Model "{0}" appears in multiple pricing entries',
-      modelConflict: "Model patterns '{model1}' and '{model2}' conflict: overlapping match range",
-      mappingConflict: "Mapping source patterns '{model1}' and '{model2}' conflict: overlapping match range",
+      modelConflict: "Model patterns '{model1}' and '{model2}' conflict: overlapping match range. Model names are matched case-insensitively, so an existing entry already covers all case variants — no need to add the variant separately.",
+      mappingConflict: "Mapping source patterns '{model1}' and '{model2}' conflict: overlapping match range. Source patterns are matched case-insensitively, so an existing entry already covers all case variants.",
       deleteConfirm: 'Are you sure you want to delete channel "{name}"? This cannot be undone.',
       columns: {
         name: 'Name',
diff --git a/frontend/src/i18n/locales/zh.ts b/frontend/src/i18n/locales/zh.ts
index ec9c51a171..2fb6f7c64e 100644
--- a/frontend/src/i18n/locales/zh.ts
+++ b/frontend/src/i18n/locales/zh.ts
@@ -2484,8 +2484,8 @@ export default {
       deleteError: '删除渠道失败',
       nameRequired: '请输入渠道名称',
       duplicateModels: '模型「{0}」在多个定价条目中重复',
-      modelConflict: "模型模式 '{model1}' 和 '{model2}' 冲突：匹配范围重叠",
-      mappingConflict: "模型映射源 '{model1}' 和 '{model2}' 冲突：匹配范围重叠",
+      modelConflict: "模型模式 '{model1}' 和 '{model2}' 冲突：匹配范围重叠。模型名称按大小写不敏感匹配，已有条目已覆盖其所有大小写变体，无需重复添加。",
+      mappingConflict: "模型映射源 '{model1}' 和 '{model2}' 冲突：匹配范围重叠。源模式按大小写不敏感匹配，已有条目已覆盖其所有大小写变体。",
       deleteConfirm: '确定要删除渠道「{name}」吗？此操作不可撤销。',
       columns: {
         name: '名称',