diff --git a/src/features/lucky-gift/components/LuckyGiftConfigDrawer.jsx b/src/features/lucky-gift/components/LuckyGiftConfigDrawer.jsx
index 1fd0ffd..0699b16 100644
--- a/src/features/lucky-gift/components/LuckyGiftConfigDrawer.jsx
+++ b/src/features/lucky-gift/components/LuckyGiftConfigDrawer.jsx
@@ -20,7 +20,12 @@ import {
     tierRTPContribution,
     updateStageTier,
 } from "@/features/lucky-gift/configModel.js";
-import { broadcastLevelOptions, rewardSourceOptions, stageOptions, optionLabel } from "@/features/lucky-gift/constants.js";
+import {
+    broadcastLevelOptions,
+    rewardSourceOptions,
+    stageOptions,
+    optionLabel,
+} from "@/features/lucky-gift/constants.js";
 import styles from "@/features/lucky-gift/lucky-gift.module.css";
 
 const helpText = {
@@ -210,7 +215,12 @@ export function LuckyGiftConfigDrawer({
                     <Button disabled={configSaving} type="button" onClick={onClose}>
                         取消
                     </Button>
-                    <Button disabled={disabled} startIcon={<SaveOutlined fontSize="small" />} type="submit" variant="primary">
+                    <Button
+                        disabled={disabled}
+                        startIcon={<SaveOutlined fontSize="small" />}
+                        type="submit"
+                        variant="primary"
+                    >
                         保存
                     </Button>
                 </div>
@@ -229,7 +239,10 @@ function StageTierEditor({ disabled, form, setForm }) {
     return (
         <div className={styles.stageStack}>
             {stageOptions.map(([stageKey, stageLabel]) => {
-                const stage = (form.stages || []).find((item) => item.stage === stageKey) || { stage: stageKey, tiers: [] };
+                const stage = (form.stages || []).find((item) => item.stage === stageKey) || {
+                    stage: stageKey,
+                    tiers: [],
+                };
                 const expectedRTP = stageExpectedRTP(stage);
                 const lowerRTP = Number(form.targetRtpPercent || 0) - Number(form.controlBandPercent || 0);
                 const upperRTP = Number(form.targetRtpPercent || 0) + Number(form.controlBandPercent || 0);
@@ -239,7 +252,9 @@ function StageTierEditor({ disabled, form, setForm }) {
                         <div className={styles.stageHeader}>
                             <FieldLabel help={helpText.stages} text={stageLabel} />
                             <div className={styles.stageMetrics}>
-                                <span className={styles.stageTotal}>概率 {formatPercent(stageProbabilityTotal(stage))}</span>
+                                <span className={styles.stageTotal}>
+                                    概率 {formatPercent(stageProbabilityTotal(stage))}
+                                </span>
                                 <span className={rtpInBand ? styles.stageTotal : styles.stageRTPError}>
                                     期望 RTP {formatPercent(expectedRTP)}
                                 </span>
@@ -261,7 +276,7 @@ function StageTierEditor({ disabled, form, setForm }) {
                                     type="button"
                                     onClick={() =>
                                         updateStages(setForm, (stages) =>
-                                            correctStageTierProbabilities(stages, stageKey, stageTargetRTP[stageKey])
+                                            correctStageTierProbabilities(stages, stageKey, stageTargetRTP[stageKey]),
                                         )
                                     }
                                 >
@@ -303,16 +318,10 @@ function defaultStageTargetRTP(targetRTPPercent) {
 }
 
 function TierRow({ disabled, setForm, stageKey, stageLabel, tier, tierCount, tierIndex }) {
-    const updateTier = (patch) => updateStages(setForm, (stages) => updateStageTier(stages, stageKey, tierIndex, patch));
+    const updateTier = (patch) =>
+        updateStages(setForm, (stages) => updateStageTier(stages, stageKey, tierIndex, patch));
     return (
         <div className={styles.tierRow}>
-            <TextField
-                required
-                disabled={disabled}
-                label="奖档 ID"
-                value={tier.tierId}
-                onChange={(event) => updateTier({ tierId: event.target.value })}
-            />
             <TextField
                 required
                 disabled={disabled}
@@ -382,7 +391,13 @@ function TierRow({ disabled, setForm, stageKey, stageLabel, tier, tierCount, tie
 
 function SelectField({ disabled, label, onChange, options, value }) {
     return (
-        <TextField select disabled={disabled} label={label} value={value} onChange={(event) => onChange(event.target.value)}>
+        <TextField
+            select
+            disabled={disabled}
+            label={label}
+            value={value}
+            onChange={(event) => onChange(event.target.value)}
+        >
             {options.map(([optionValue, optionLabelText]) => (
                 <MenuItem key={optionValue} value={optionValue}>
                     {optionLabelText || optionLabel(options, optionValue)}
diff --git a/src/features/lucky-gift/configModel.js b/src/features/lucky-gift/configModel.js
index d64cba8..e10b0df 100644
--- a/src/features/lucky-gift/configModel.js
+++ b/src/features/lucky-gift/configModel.js
@@ -76,6 +76,7 @@ export function formFromConfig(config) {
 export function payloadFromLuckyGiftForm(form) {
     // 第一阶段的新契约明确要求后台只提交百分比和倍数；ppm 是 server 的持久化细节，
     // 这里保留业务单位可以避免再次出现 target_rtp_ppm=95 这类单位错配。
+    const stages = assignGeneratedTierIDs(normalizeStages(form.stages));
     return {
         control_band_percent: decimal(form.controlBandPercent),
         effective_from_ms: integer(form.effectiveFromMs),
@@ -92,7 +93,7 @@ export function payloadFromLuckyGiftForm(form) {
         pool_id: String(form.poolId || "").trim(),
         pool_rate_percent: decimal(form.poolRatePercent),
         settlement_window_wager: integer(form.settlementWindowWager),
-        stages: normalizeStages(form.stages).map((stage) => ({
+        stages: stages.map((stage) => ({
             stage: stage.stage,
             tiers: stage.tiers.map((item) => ({
                 broadcast_level: item.broadcastLevel,
@@ -126,23 +127,25 @@ export function previewForForm(form) {
 }
 
 export function addTierToStage(stages, stageKey) {
-    return stages.map((stage) => {
-        if (stage.stage !== stageKey) {
-            return stage;
-        }
-        const nextMultiplier = nextSuggestedTierMultiplier(stage.tiers);
-        return {
-            ...stage,
-            tiers: [
-                ...stage.tiers,
-                tier(tierIDFromMultiplier(stage.stage, nextMultiplier), nextMultiplier, "", {
-                    broadcastLevel: "none",
-                    highWaterOnly: nextMultiplier >= 5,
-                    rewardSource: "base_rtp",
-                }),
-            ],
-        };
-    });
+    return assignGeneratedTierIDs(
+        stages.map((stage) => {
+            if (stage.stage !== stageKey) {
+                return stage;
+            }
+            const nextMultiplier = nextSuggestedTierMultiplier(stage.tiers);
+            return {
+                ...stage,
+                tiers: [
+                    ...stage.tiers,
+                    tier(tierIDFromMultiplier(stage.stage, nextMultiplier), nextMultiplier, "", {
+                        broadcastLevel: "none",
+                        highWaterOnly: nextMultiplier >= 5,
+                        rewardSource: "base_rtp",
+                    }),
+                ],
+            };
+        }),
+    );
 }
 
 export function removeTierFromStage(stages, stageKey, tierIndex) {
@@ -175,8 +178,12 @@ export function correctStageTierProbabilities(stages, stageKey, targetRTPPercent
         const enabledTiers = stage.tiers
             .map((item, index) => ({ index, multiplier: decimal(item.multiplier), tier: item }))
             .filter((item) => item.tier.enabled !== false);
-        const baseTiers = enabledTiers.filter((item) => item.tier.rewardSource === "base_rtp" && Number.isFinite(item.multiplier));
-        const positiveTiers = baseTiers.filter((item) => item.multiplier > 0).sort((left, right) => left.multiplier - right.multiplier);
+        const baseTiers = enabledTiers.filter(
+            (item) => item.tier.rewardSource === "base_rtp" && Number.isFinite(item.multiplier),
+        );
+        const positiveTiers = baseTiers
+            .filter((item) => item.multiplier > 0)
+            .sort((left, right) => left.multiplier - right.multiplier);
         const zeroTiers = baseTiers.filter((item) => item.multiplier === 0);
         if (enabledTiers.length === 0 || positiveTiers.length === 0) {
             return stage;
@@ -188,7 +195,7 @@ export function correctStageTierProbabilities(stages, stageKey, targetRTPPercent
         }
         const fixedExpectedRTP = positiveTiers.reduce(
             (sum, item) => sum + item.multiplier * (probabilityByIndex.get(item.index) || 0),
-            0
+            0,
         );
         const remainingProbability = 100 - fixedProbability;
         const targetExtraRTP = targetRTP - fixedExpectedRTP;
@@ -231,6 +238,22 @@ export function tierRTPContribution(tier) {
     return expectedContributionPercent(tier.multiplier, tier.probabilityPercent);
 }
 
+export function assignGeneratedTierIDs(stages) {
+    return (stages || []).map((stage) => {
+        const used = new Map();
+        const tiers = (stage.tiers || []).map((item) => {
+            const baseID = tierIDFromMultiplier(stage.stage, item.multiplier);
+            const usedCount = used.get(baseID) || 0;
+            used.set(baseID, usedCount + 1);
+            return {
+                ...item,
+                tierId: usedCount === 0 ? baseID : `${baseID}_${usedCount + 1}`,
+            };
+        });
+        return { ...stage, tiers };
+    });
+}
+
 function defaultStages() {
     return stageOptions.map(([stage]) => ({ stage, tiers: defaultStageTiers[stage].map((item) => ({ ...item })) }));
 }
@@ -253,7 +276,11 @@ function nextSuggestedTierMultiplier(tiers) {
 }
 
 function tierIDFromMultiplier(stage, multiplier) {
-    const multiplierText = String(multiplier).replace(".", "_");
+    const value = decimal(multiplier);
+    if (value <= 0) {
+        return `${stage}_none`;
+    }
+    const multiplierText = formatDecimal(value).replace(".", "_");
     return `${stage}_${multiplierText}x`;
 }
 
@@ -261,22 +288,25 @@ function normalizeStages(stages) {
     // server 返回缺阶段时仍用默认三阶段补齐表单，保证运营看到的是完整发布形态；
     // 保存时 schema 会再次校验概率合计和 0x 档，不让半成品配置进入发布请求。
     const byStage = new Map((stages || []).map((stage) => [stage.stage, stage]));
-    return stageOptions.map(([stage]) => {
-        const source = byStage.get(stage);
-        const tiers = Array.isArray(source?.tiers) && source.tiers.length > 0 ? source.tiers : defaultStageTiers[stage];
-        return {
-            stage,
-            tiers: tiers.map((item) => ({
-                broadcastLevel: item.broadcastLevel || "none",
-                enabled: item.enabled !== false,
-                highWaterOnly: Boolean(item.highWaterOnly),
-                multiplier: formatDecimal(item.multiplier),
-                probabilityPercent: formatDecimal(item.probabilityPercent),
-                rewardSource: item.rewardSource || "base_rtp",
-                tierId: item.tierId || "",
-            })),
-        };
-    });
+    return assignGeneratedTierIDs(
+        stageOptions.map(([stage]) => {
+            const source = byStage.get(stage);
+            const tiers =
+                Array.isArray(source?.tiers) && source.tiers.length > 0 ? source.tiers : defaultStageTiers[stage];
+            return {
+                stage,
+                tiers: tiers.map((item) => ({
+                    broadcastLevel: item.broadcastLevel || "none",
+                    enabled: item.enabled !== false,
+                    highWaterOnly: Boolean(item.highWaterOnly),
+                    multiplier: formatDecimal(item.multiplier),
+                    probabilityPercent: formatDecimal(item.probabilityPercent),
+                    rewardSource: item.rewardSource || "base_rtp",
+                    tierId: item.tierId || "",
+                })),
+            };
+        }),
+    );
 }
 
 function cloneStages(stages) {
@@ -285,7 +315,10 @@ function cloneStages(stages) {
 
 function positiveBaselineProbabilities(enabled) {
     const probabilities = new Map();
-    const floor = enabled.length * minimumCorrectedProbabilityPercent <= 100 ? minimumCorrectedProbabilityPercent : 100 / enabled.length;
+    const floor =
+        enabled.length * minimumCorrectedProbabilityPercent <= 100
+            ? minimumCorrectedProbabilityPercent
+            : 100 / enabled.length;
     for (const item of enabled) {
         probabilities.set(item.index, roundPercent(floor));
     }
diff --git a/src/features/lucky-gift/configModel.test.js b/src/features/lucky-gift/configModel.test.js
index c0db68c..1e108ea 100644
--- a/src/features/lucky-gift/configModel.test.js
+++ b/src/features/lucky-gift/configModel.test.js
@@ -65,6 +65,31 @@ describe("lucky gift config payload", () => {
         });
     });
 
+    test("regenerates unique tier ids when building submit payload", () => {
+        const form = emptyLuckyGiftForm();
+        const advanced = form.stages.find((stage) => stage.stage === "advanced");
+        advanced.tiers = [
+            ...advanced.tiers,
+            {
+                ...advanced.tiers[advanced.tiers.length - 1],
+                multiplier: 5,
+                probabilityPercent: 0,
+                tierId: "manual_duplicate",
+            },
+        ];
+
+        const payload = payloadFromLuckyGiftForm(form);
+        const advancedPayload = payload.stages.find((stage) => stage.stage === "advanced");
+
+        expect(advancedPayload.tiers.map((tier) => tier.tier_id)).toEqual([
+            "advanced_none",
+            "advanced_1x",
+            "advanced_2x",
+            "advanced_5x",
+            "advanced_5x_2",
+        ]);
+    });
+
     test("corrects a stage probability to requested RTP without zeroing enabled tiers", () => {
         const form = emptyLuckyGiftForm();
         const nextStages = correctStageTierProbabilities(form.stages, "normal", 95);
diff --git a/src/features/lucky-gift/schema.test.ts b/src/features/lucky-gift/schema.test.ts
index 28bca55..8854dff 100644
--- a/src/features/lucky-gift/schema.test.ts
+++ b/src/features/lucky-gift/schema.test.ts
@@ -19,16 +19,18 @@ describe("lucky gift config schema", () => {
         }
     });
 
-    test("rejects duplicated tier id inside the same stage before submit", () => {
+    test("does not require manually maintained tier ids before submit", () => {
         const form = emptyLuckyGiftForm();
         const advanced = form.stages.find((stage: { stage: string }) => stage.stage === "advanced");
         if (!advanced) {
             throw new Error("advanced stage missing");
         }
+        advanced.tiers[0].tierId = "";
         advanced.tiers = [
             ...advanced.tiers,
             {
                 ...advanced.tiers[advanced.tiers.length - 1],
+                enabled: false,
                 multiplier: 10,
                 probabilityPercent: 0,
                 tierId: "advanced_5x",
@@ -37,9 +39,6 @@ describe("lucky gift config schema", () => {
 
         const result = luckyGiftConfigFormSchema.safeParse(form);
 
-        expect(result.success).toBe(false);
-        if (!result.success) {
-            expect(result.error.issues.map((issue) => issue.message)).toContain("同一阶段内奖档 ID 不能重复");
-        }
+        expect(result.success).toBe(true);
     });
 });
diff --git a/src/features/lucky-gift/schema.ts b/src/features/lucky-gift/schema.ts
index de949d0..e0e57fc 100644
--- a/src/features/lucky-gift/schema.ts
+++ b/src/features/lucky-gift/schema.ts
@@ -17,7 +17,7 @@ const stageTierSchema = z.object({
     multiplier: z.coerce.number().min(0, "倍率不能小于 0"),
     probabilityPercent: z.coerce.number().min(0, "概率不能小于 0").max(100, "概率不能超过 100%"),
     rewardSource: z.enum(rewardSources),
-    tierId: z.string().trim().min(1, "奖档 ID 不能为空").max(96, "奖档 ID 不能超过 96 个字符"),
+    tierId: z.string().trim().max(96, "奖档 ID 不能超过 96 个字符").optional().default(""),
 });
 
 const stageSchema = z.object({
@@ -31,8 +31,14 @@ export const luckyGiftConfigFormSchema = z
         effectiveFromMs: z.coerce.number().int("生效时间必须是毫秒整数").min(0, "生效时间不能小于 0"),
         enabled: z.boolean(),
         giftPriceReference: z.coerce.number().int("参考价格必须是整数").gt(0, "参考价格必须大于 0"),
-        noviceMaxEquivalentDraws: z.coerce.number().int("新手阶段等价抽数必须是整数").min(0, "新手阶段等价抽数不能小于 0"),
-        normalMaxEquivalentDraws: z.coerce.number().int("正常阶段等价抽数必须是整数").min(0, "正常阶段等价抽数不能小于 0"),
+        noviceMaxEquivalentDraws: z.coerce
+            .number()
+            .int("新手阶段等价抽数必须是整数")
+            .min(0, "新手阶段等价抽数不能小于 0"),
+        normalMaxEquivalentDraws: z.coerce
+            .number()
+            .int("正常阶段等价抽数必须是整数")
+            .min(0, "正常阶段等价抽数不能小于 0"),
         maxSinglePayout: z.coerce.number().int("单次返奖上限必须是整数").gt(0, "单次返奖上限必须大于 0"),
         userHourlyPayoutCap: z.coerce.number().int("用户小时上限必须是整数").gt(0, "用户小时上限必须大于 0"),
         userDailyPayoutCap: z.coerce.number().int("用户每日上限必须是整数").gt(0, "用户每日上限必须大于 0"),
@@ -93,23 +99,14 @@ export const luckyGiftConfigFormSchema = z
                     path: ["stages", stageIndex, "tiers"],
                 });
             }
-            const tierIDSet = new Set<string>();
-            stage.tiers.forEach((tier, tierIndex) => {
-                const tierID = String(tier.tierId || "").trim();
-                if (tierIDSet.has(tierID)) {
-                    context.addIssue({
-                        code: "custom",
-                        message: "同一阶段内奖档 ID 不能重复",
-                        path: ["stages", stageIndex, "tiers", tierIndex, "tierId"],
-                    });
-                }
-                tierIDSet.add(tierID);
-            });
             const expectedRTPPPM = stage.tiers.reduce((sum, tier) => {
                 if (!tier.enabled || tier.rewardSource !== "base_rtp") {
                     return sum;
                 }
-                return sum + Math.trunc((multiplierToPPM(tier.multiplier) * percentToPPM(tier.probabilityPercent)) / ppmScale);
+                return (
+                    sum +
+                    Math.trunc((multiplierToPPM(tier.multiplier) * percentToPPM(tier.probabilityPercent)) / ppmScale)
+                );
             }, 0);
             const expectedRTP = expectedRTPPPM / 10_000;
             const lowerRTPPPM = percentToPPM(value.targetRtpPercent - value.controlBandPercent);