Play rejects a version code it has already seen, and between releases
pubspec's code is by definition already published — so every scheduled
dry-run died on "Version code 69 has already been used" before reaching
any of the credential, signing, or store validation it exists to check.
It has been failing on that since 5.1.0 shipped.
Overrides the build number with epoch seconds, which is always unused and
always increasing. The bundle is validate_only, never published, so the
value is discarded. Only downside is the dry-run can no longer catch a
forgotten version bump, which the real release catches anyway.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
c939dc2790