|
| 1 | + |
| 2 | +That means Dependabot couldn’t create a PR because the branch it generated conflicts with existing code in a way that prevents a clean merge. |
| 3 | + |
| 4 | + |
| 5 | +--- |
| 6 | + |
| 7 | +🔍 Root Cause |
| 8 | + |
| 9 | +Dependabot tries to update a dependency (e.g. a version bump in yarn.lock or package.json) and push it to a new branch. But: |
| 10 | + |
| 11 | +The branch it wants to create already exists with conflicting code |
| 12 | + |
| 13 | +Or, the base branch (e.g. main) has diverged too far from where the bot ran |
| 14 | + |
| 15 | +Or your repo may have force-pushed/amended history causing reference mismatches |
| 16 | + |
| 17 | + |
| 18 | + |
| 19 | +--- |
| 20 | + |
| 21 | +✅ How to Fix It |
| 22 | + |
| 23 | +🧹 1. Delete the broken branch |
| 24 | + |
| 25 | +If the Dependabot branch already exists but is broken, delete it: |
| 26 | + |
| 27 | +# Replace with actual branch name |
| 28 | +git push origin --delete dependabot/yarn/example-package-x.y.z |
| 29 | + |
| 30 | +Or delete it via the GitHub UI under Branches tab. |
| 31 | + |
| 32 | + |
| 33 | +--- |
| 34 | + |
| 35 | +🛠 2. Re-run Dependabot |
| 36 | + |
| 37 | +Trigger it manually again by: |
| 38 | + |
| 39 | +Going to GitHub → Insights → Dependency graph → Dependabot |
| 40 | + |
| 41 | +Or editing .github/dependabot.yml and committing a small change (e.g., bumping the schedule.interval) |
| 42 | + |
| 43 | +Or using the GitHub CLI: |
| 44 | + |
| 45 | + |
| 46 | +gh api \ |
| 47 | + -X POST \ |
| 48 | + -H "Accept: application/vnd.github+json" \ |
| 49 | + /repos/:owner/:repo/dependabot/updates \ |
| 50 | + -f package-ecosystem=yarn \ |
| 51 | + -f directory=/ \ |
| 52 | + -f target-branch=main |
| 53 | + |
| 54 | + |
| 55 | +--- |
| 56 | + |
| 57 | +🧪 3. Verify yarn.lock and package.json manually |
| 58 | + |
| 59 | +Sometimes the repo has custom lockfile settings or pinning that trip up Dependabot. |
| 60 | + |
| 61 | +Make sure yarn.lock is consistent with package.json |
| 62 | + |
| 63 | +Try running: |
| 64 | + |
| 65 | + |
| 66 | +yarn install --check-files |
| 67 | +yarn audit |
| 68 | + |
| 69 | +If the lockfile looks stale or corrupted, run: |
| 70 | + |
| 71 | +rm yarn.lock |
| 72 | +yarn install |
| 73 | + |
| 74 | +Then commit and push it manually. |
| 75 | + |
| 76 | + |
| 77 | +--- |
| 78 | + |
| 79 | +🧱 4. Check Dependabot Version Constraints |
| 80 | + |
| 81 | +Make sure .github/dependabot.yml isn't requesting incompatible versions or unreachable targets. |
| 82 | + |
| 83 | +Example config: |
| 84 | + |
| 85 | +updates: |
| 86 | + - package-ecosystem: "yarn" |
| 87 | + directory: "/" |
| 88 | + schedule: |
| 89 | + interval: "daily" |
| 90 | + versioning-strategy: increase |
| 91 | + |
| 92 | +If it’s set to lockfile-only, make sure the lockfile isn’t blocked by outdated sub-dependencies. |
| 93 | + |
| 94 | + |
| 95 | +--- |
| 96 | + |
| 97 | +🧩 Optional: Switch to GitHub Actions Debug Mode |
| 98 | + |
| 99 | +Add a step in .github/workflows/dependabot-auto-rebase.yml to debug branches, fetch diffs, or log conflicts before PR attempts. |
| 100 | + |
| 101 | + |
| 102 | +--- |
| 103 | + |
| 104 | +Want me to generate a fixed .dependabot.yml, clean-up script, or GitHub Action to auto-resolve broken Dependabot branches? Just say the word. |
| 105 | + |
0 commit comments