If there is not major database structure modification on your Fogbugz version than 8.7.60, you can try the latest version of the importer plugin https://marketplace.atlassian.com/plugins/com.atlassian.jira.plugins.jira-importers-plugin should not be a problem.
Hey Atlassian community, I help lead engineering at Sentry, an open-source error-tracking and monitoring tool that integrates with Jira. We started using Jira Software Cloud internally last year, a...
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