diff --git a/scripts/spacetime-migration-common.mjs b/scripts/spacetime-migration-common.mjs
index d1366a0a3..e2f628ade 100644
--- a/scripts/spacetime-migration-common.mjs
+++ b/scripts/spacetime-migration-common.mjs
@@ -281,7 +281,7 @@ export async function assertReadableFile(filePath) {
 
 function normalizeProcedureResult(value, procedureName) {
   if (value && typeof value === 'object' && !Array.isArray(value)) {
-    return value;
+    return normalizeSatsObject(value, procedureName);
   }
 
   if (Array.isArray(value)) {
@@ -291,6 +291,25 @@ function normalizeProcedureResult(value, procedureName) {
   throw new Error('procedure 返回值不是对象。');
 }
 
+function normalizeSatsObject(value, procedureName) {
+  const normalized = normalizeSatsValue(value);
+  if (
+    procedureName !==
+      'normalize_editor_character_animation_metadata_and_return' ||
+    !normalized ||
+    typeof normalized !== 'object' ||
+    Array.isArray(normalized)
+  ) {
+    return normalized;
+  }
+
+  const { batch_sha_256: batchSha256, ...result } = normalized;
+  return {
+    ...result,
+    batch_sha256: result.batch_sha256 ?? batchSha256,
+  };
+}
+
 function normalizeSatsProduct(value, procedureName) {
   if (
     procedureName === 'normalize_editor_character_animation_metadata_and_return' &&
diff --git a/scripts/spacetime-migration-common.test.ts b/scripts/spacetime-migration-common.test.ts
index 5a89d09f5..3ee503215 100644
--- a/scripts/spacetime-migration-common.test.ts
+++ b/scripts/spacetime-migration-common.test.ts
@@ -148,4 +148,30 @@ describe('SpacetimeDB CLI SATS option encoding', () => {
       error_message: null,
     });
   });
+
+  it('normalizes object-shaped character action procedure results', () => {
+    const result = parseProcedureResult(
+      JSON.stringify({
+        ok: true,
+        scope: 'asset',
+        dry_run: true,
+        scanned_count: 25,
+        matched_count: 3,
+        updated_count: 0,
+        blocker_count: 0,
+        blocker_ids: [],
+        next_cursor: 'asset-25',
+        has_more: true,
+        batch_sha_256: 'b'.repeat(64),
+        error_message: null,
+      }),
+      'normalize_editor_character_animation_metadata_and_return',
+    );
+
+    expect(result).toMatchObject({
+      batch_sha256: 'b'.repeat(64),
+      next_cursor: 'asset-25',
+    });
+    expect(result).not.toHaveProperty('batch_sha_256');
+  });
 });
diff --git a/scripts/spacetime-normalize-editor-character-actions.mjs b/scripts/spacetime-normalize-editor-character-actions.mjs
index 9548780c9..fe6927690 100644
--- a/scripts/spacetime-normalize-editor-character-actions.mjs
+++ b/scripts/spacetime-normalize-editor-character-actions.mjs
@@ -140,6 +140,7 @@ export async function scanScopes(
   const summaries = [];
   for (const scope of SCOPES) {
     let cursor = null;
+    const seenCursors = new Set();
     const summary = {
       scope,
       scanned_count: 0,
@@ -185,10 +186,17 @@ export async function scanScopes(
         }
         summary.updated_count += applied.updated_count;
       }
-      cursor = dryRun.has_more ? dryRun.next_cursor : null;
-      if (dryRun.has_more && !cursor) {
+      const nextCursor = dryRun.has_more ? dryRun.next_cursor : null;
+      if (dryRun.has_more && !nextCursor) {
         throw new Error(`${scope} scope 声明 has_more 但未返回 next_cursor。`);
       }
+      if (nextCursor && seenCursors.has(nextCursor)) {
+        throw new Error(`${scope} scope 返回了重复的 next_cursor: ${nextCursor}。`);
+      }
+      if (nextCursor) {
+        seenCursors.add(nextCursor);
+      }
+      cursor = nextCursor;
     } while (cursor);
     summaries.push(summary);
   }
diff --git a/scripts/spacetime-normalize-editor-character-actions.test.ts b/scripts/spacetime-normalize-editor-character-actions.test.ts
index c464d8deb..ed3259201 100644
--- a/scripts/spacetime-normalize-editor-character-actions.test.ts
+++ b/scripts/spacetime-normalize-editor-character-actions.test.ts
@@ -160,4 +160,31 @@ describe('角色动作元数据规范化脚本', () => {
     }
     expect(calls.at(-2)?.limit).toBe(5);
   });
+
+  it('拒绝 procedure 返回已访问过的 cursor', async () => {
+    let callCount = 0;
+    const callProcedure = async () => {
+      callCount += 1;
+      const nextCursor = ['asset-25', 'asset-50', 'asset-25'][callCount - 1];
+      return {
+        ok: true,
+        scope: 'asset',
+        dry_run: true,
+        scanned_count: 1,
+        matched_count: 0,
+        updated_count: 0,
+        blocker_count: 0,
+        blocker_ids: [],
+        next_cursor: nextCursor,
+        has_more: true,
+        batch_sha256: 'a'.repeat(64),
+        error_message: null,
+      };
+    };
+
+    await expect(
+      scanScopes({ chunkSize: 25 }, { callProcedure }),
+    ).rejects.toThrow('重复的 next_cursor: asset-25');
+    expect(callCount).toBe(3);
+  });
 });