{"record":{"id":"256fa5755fe3e8cc","repo":"hashicorp/vagrant","slug":"because-there-were-errors-upgrading-your-vagrantfi","errorCode":null,"errorMessage":"Because there were errors upgrading your Vagrantfiles, Vagrant\ncan no longer continue. Please fix the errors above and try again.","messagePattern":"Because there were errors upgrading your Vagrantfiles, Vagrant\ncan no longer continue\\. Please fix the errors above and try again\\.","errorType":"exception","errorClass":"Vagrant::Errors::ConfigUpgradeErrors","httpStatus":null,"severity":"error","filePath":"lib/vagrant/vagrantfile.rb","lineNumber":72,"sourceCode":"      config_warnings = results[:config_warnings]\n      provider_cls    = results[:provider_cls]\n      provider_options = results[:provider_options]\n\n      # If there were warnings or errors we want to output them\n      if !config_warnings.empty? || !config_errors.empty?\n        # The color of the output depends on whether we have warnings\n        # or errors...\n        level  = config_errors.empty? ? :warn : :error\n        output = Util::TemplateRenderer.render(\n          \"config/messages\",\n          warnings: config_warnings,\n          errors: config_errors).chomp\n        env.ui.send(level, I18n.t(\"vagrant.general.config_upgrade_messages\",\n                               name: name,\n                               output: output))\n\n        # If we had errors, then we bail\n        raise Errors::ConfigUpgradeErrors if !config_errors.empty?\n      end\n\n      # Get the provider configuration from the final loaded configuration\n      provider_config = config.vm.get_provider_config(provider)\n\n      # Create machine data directory if it doesn't exist\n      # XXX: Permissions error here.\n      FileUtils.mkdir_p(data_path)\n\n      # Create the machine and cache it for future calls. This will also\n      # return the machine from this method.\n      return Machine.new(name, provider, provider_cls, provider_config,\n        provider_options, config, data_path, box, env, self)\n    end\n    # Returns the configuration for a single machine.\n    #\n    # When loading a box Vagrantfile, it will be prepended to the\n    # key order specified when initializing this class. Sub-machine","sourceCodeStart":54,"sourceCodeEnd":90,"githubUrl":"https://github.com/hashicorp/vagrant/blob/35f3160f4ad6edc3a9f3aa9570adfc1a4d73aaa5/lib/vagrant/vagrantfile.rb#L54-L90","documentation":"Raised while loading a Vagrantfile when an old config version had to be auto-upgraded to the current schema and the upgraded result still fails validation. Vagrant renders all warnings and errors via the config/messages template, prints them as part of the config upgrade output, and then aborts with this error because hard validation errors remain. The detailed per-error reasons appear in the output just above this message.","triggerScenarios":"Loading an environment (any `vagrant up`/`ssh`/`status`, or Environment#machine_config) whose Vagrantfile was written for an older config version - e.g. Vagrant 1.x-era keys like `config.vm.forward_port` - after upgrading the Vagrant binary, where the upgraded config no longer validates.","commonSituations":"Major-version Vagrant upgrade against legacy Vagrantfiles checked into a repo; plugins injecting settings that are invalid under the new config version; CI images rebuilt with a newer Vagrant running against an old project.","solutions":["Read the validation errors printed just above the message and fix each one in the Vagrantfile","Replace removed 1.x syntax, e.g. `config.vm.forward_port 80, 8080` with `config.vm.network \"forwarded_port\", guest: 80, host: 8080`","Run `vagrant validate` after edits to confirm the file loads cleanly","Check the release/upgrading notes for your Vagrant version for renamed or removed settings"],"exampleFix":"# before (Vagrant 1.x-style Vagrantfile)\nconfig.vm.forward_port 80, 8080\n\n# after\nconfig.vm.network \"forwarded_port\", guest: 80, host: 8080","handlingStrategy":"validation","validationCode":"# bash CI gate: fail fast on invalid Vagrantfiles before any vagrant command\nvagrant validate || exit 1","typeGuard":null,"tryCatchPattern":"begin\n  env = Vagrant::Environment.new(cwd: project_dir)\n  env.cli(%w(up))\nrescue Vagrant::Errors::ConfigUpgradeErrors\n  warn 'Vagrantfile failed the config upgrade; run `vagrant validate` and fix the listed errors'\n  exit 1\nend","preventionTips":["Run `vagrant validate` in CI for every Vagrantfile change","Upgrade Vagrant one minor version at a time in dev before rolling to CI","Replace legacy 1.x syntax (forward_port, customize styles) when touching old files","Treat printed config-upgrade warnings as backlog even when only warnings are shown"],"tags":["config","vagrantfile","upgrade","migration"],"backgroundTag":"config-schema-upgrade-failed","analyzedSha":"35f3160f4ad6edc3a9f3aa9570adfc1a4d73aaa5","analyzedAt":"2026-08-21T13:34:32.514Z","schemaVersion":2},"datasetVersion":"2026-08-21T18:17:14.833Z"}