Error: release-please failed: Cannot read properties of undefined (reading 'replace')

[drstrangelooker]

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Environment details

• Programming language: monorepo - TS, Python, Go, Kotlin, CSharp, Swift
• OS: Ubuntu latest
• Language runtime version:
• Package version: v4 tested with v4 and with v4.1.2 specifically

Steps to reproduce

1. Run release-please-action in the sdk-codegen repo.
2. Expect to update the existing PR, instead get Error: release-please failed: Cannot read properties of undefined (reading 'replace').

Making sure to follow these steps will guarantee the quickest resolution possible.

Thanks!

[drstrangelooker]

Additional info from running with --debug

TypeError: Cannot read properties of undefined (reading 'replace')
    at safeBranchName (/usr/local/google/home/drstrangelove/release-please/node_modules/release-please/build/src/util/branch-name.js:214:23)
    at BranchName.ofGroupTargetBranch (/usr/local/google/home/drstrangelove/release-please/node_modules/release-please/build/src/util/branch-name.js:63:93)
    at LinkedVersions.run (/usr/local/google/home/drstrangelove/release-please/node_modules/release-please/build/src/plugins/linked-versions.js:128:58)
    at Manifest.buildPullRequests (/usr/local/google/home/drstrangelove/release-please/node_modules/release-please/build/src/manifest.js:405:51)
    at async Object.handler (/usr/local/google/home/drstrangelove/release-please/node_modules/release-please/build/src/bin/release-please.js:328:34)