{
  "id": "python/sqlalchemy-multiple-heads-migration",
  "signature": "alembic.util.exc.CommandError: Multiple head revisions are present for given argument chain; please specify a specific target revision.",
  "signature_zh": "Alembic 命令错误：给定的参数链存在多个头版本，请指定具体的目标版本。",
  "regex": "alembic\\.util\\.exc\\.CommandError:\\ Multiple\\ head\\ revisions\\ are\\ present\\ for\\ given\\ argument\\ chain;\\ please\\ specify\\ a\\ specific\\ target\\ revision\\.",
  "domain": "python",
  "category": "config_error",
  "subcategory": null,
  "root_cause": "数据库迁移脚本中出现了多个分支头，Alembic 无法自动选择升级路径。",
  "root_cause_type": "generic",
  "root_cause_zh": "数据库迁移脚本中出现了多个分支头，Alembic 无法自动选择升级路径。",
  "versions": [
    {
      "version": "1.13.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "手动删除某个迁移文件，但会导致版本历史不完整，其他开发者的环境无法同步。",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "尝试直接修改 alembic_version 表，但可能造成与迁移脚本不一致。",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "",
      "success_rate": 0.9,
      "how": "使用 alembic merge -m 'merge heads' 合并多个头，生成一个合并迁移。",
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "success_rate": 0.7,
      "how": "指定具体的升级目标，例如：alembic upgrade <revision>",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": null,
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.86,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-06-01",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}