{
  "id": "python/flask-migrate-downgrade-error",
  "signature": "alembic.util.exc.CommandError: Can't locate revision identified by 'abc123'",
  "signature_zh": "Alembic命令错误：无法找到由'abc123'标识的修订版本",
  "regex": "alembic\\.util\\.exc\\.CommandError:\\ Can't\\ locate\\ revision\\ identified\\ by\\ 'abc123'",
  "domain": "python",
  "category": "config_error",
  "subcategory": null,
  "root_cause": "Flask-Migrate cannot find a specific migration revision in the migrations folder.",
  "root_cause_type": "generic",
  "root_cause_zh": "Flask-Migrate无法在迁移文件夹中找到特定的迁移修订版本。",
  "versions": [
    {
      "version": "3.x",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "Deleting the migrations folder and starting over",
      "why_fails": "Loses all migration history; may cause data loss.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "Manually editing the migration files",
      "why_fails": "Can cause inconsistency; error-prone.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Check the migration history and use a valid revision",
      "success_rate": 0.9,
      "how": "flask db history\nflask db downgrade <valid_revision>",
      "condition": "",
      "sources": []
    },
    {
      "action": "Recreate the migration from scratch if necessary",
      "success_rate": 0.85,
      "how": "flask db stamp head\nflask db migrate\nflask db upgrade",
      "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": 0.85,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-05-25",
  "last_confirmed": "2025-01-01",
  "last_updated": "2025-01-01",
  "evidence_count": 0,
  "tags": [],
  "locale": "en",
  "aliases": []
}