diff --git a/api/migrations/versions/c87c9cdb52c4_202604281114.py b/api/migrations/versions/c87c9cdb52c4_202604281114.py
deleted file mode 100644
index 5e529d97..00000000
--- a/api/migrations/versions/c87c9cdb52c4_202604281114.py
+++ /dev/null
@@ -1,140 +0,0 @@
-"""202604281114
-
-Revision ID: c87c9cdb52c4
-Revises: e2d60c6d1a1a
-Create Date: 2026-04-28 11:13:02.441905
-
-"""
-from typing import Dict, List, Sequence, Union
-
-from alembic import op
-import sqlalchemy as sa
-
-# revision identifiers, used by Alembic.
-revision: str = 'c87c9cdb52c4'
-down_revision: Union[str, None] = 'e2d60c6d1a1a'
-branch_labels: Union[str, Sequence[str], None] = None
-depends_on: Union[str, Sequence[str], None] = None
-
-BATCH_SIZE = 500
-
-
-def _chunked(values: List[str], size: int) -> List[List[str]]:
-    return [values[index:index + size] for index in range(0, len(values), size)]
-
-
-def _load_neo4j_end_user_ids(connection) -> List[str]:
-    """加载所有需要从 Neo4j 同步 memory_count 的宿主。
-
-    RAG 工作空间的记忆数量以 documents.chunk_num 为准，不写入 end_users.memory_count。
-    """
-    rows = connection.execute(sa.text("""
-        SELECT eu.id::text AS end_user_id
-        FROM end_users eu
-        JOIN workspaces w ON eu.workspace_id = w.id
-        WHERE w.storage_type IS NULL OR w.storage_type <> 'rag'
-    """)).all()
-    return [row[0] for row in rows]
-
-
-async def _fetch_neo4j_counts(end_user_ids: List[str]) -> Dict[str, int]:
-    if not end_user_ids:
-        return {}
-
-    from app.repositories.memory_config_repository import MemoryConfigRepository
-    from app.repositories.neo4j.neo4j_connector import Neo4jConnector
-
-    connector = Neo4jConnector()
-    try:
-        result = await connector.execute_query(
-            MemoryConfigRepository.SEARCH_FOR_ALL_BATCH,
-            end_user_ids=end_user_ids,
-        )
-    finally:
-        await connector.close()
-
-    counts = {str(row["user_id"]): int(row["total"]) for row in result}
-    for end_user_id in end_user_ids:
-        counts.setdefault(end_user_id, 0)
-    return counts
-
-
-def _update_memory_counts(connection, counts: Dict[str, int]) -> int:
-    updated = 0
-    for end_user_id, memory_count in counts.items():
-        result = connection.execute(
-            sa.text("""
-                UPDATE end_users
-                SET memory_count = :memory_count
-                WHERE id = CAST(:end_user_id AS uuid)
-            """),
-            {
-                "end_user_id": end_user_id,
-                "memory_count": memory_count,
-            },
-        )
-        updated += result.rowcount or 0
-    return updated
-
-
-def _sync_memory_count_from_neo4j() -> None:
-    """迁移时初始化 Neo4j 模式宿主的 memory_count。
-
-    """
-    import asyncio
-
-    print("[memory_count] 开始同步 Neo4j 模式宿主 memory_count")
-    connection = op.get_bind()
-    target_ids = _load_neo4j_end_user_ids(connection)
-    if not target_ids:
-        print("[memory_count] 没有需要同步的 Neo4j 模式宿主")
-        return
-
-    print(
-        f"[memory_count] 待同步宿主数量: {len(target_ids)}, "
-        f"batch_size={BATCH_SIZE}"
-    )
-
-    total_updated = 0
-    batches = _chunked(target_ids, BATCH_SIZE)
-    for batch_index, batch_ids in enumerate(batches, start=1):
-        print(
-            f"[memory_count] 正在查询 Neo4j: "
-            f"batch={batch_index}/{len(batches)}, size={len(batch_ids)}"
-        )
-        counts = asyncio.run(_fetch_neo4j_counts(batch_ids))
-        total_updated += _update_memory_counts(connection, counts)
-        print(
-            f"[memory_count] 已写入 PostgreSQL: "
-            f"updated={total_updated}/{len(target_ids)}"
-        )
-
-    print(
-        f"[memory_count] Neo4j 模式宿主同步完成: "
-        f"total={len(target_ids)}, updated={total_updated}"
-    )
-
-
-def upgrade() -> None:
-    op.add_column(
-        'end_users',
-        sa.Column(
-            'memory_count',
-            sa.Integer(),
-            server_default='0',
-            nullable=False,
-            comment='记忆节点总数',
-        ),
-    )
-    _sync_memory_count_from_neo4j()
-    op.create_index(
-        op.f('ix_end_users_memory_count'),
-        'end_users',
-        ['memory_count'],
-        unique=False,
-    )
-
-
-def downgrade() -> None:
-    op.drop_index(op.f('ix_end_users_memory_count'), table_name='end_users')
-    op.drop_column('end_users', 'memory_count')