Failed to migrate users and groups from Jira Software (docker) to cloud

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We are running our Jira Software in docker on AWS ec2 instance and tried to migrate the users and groups to cloud using Cloud Migration Assistant but it failed. Reports were not generated and suggested to look into atlassian-jira.log for more details. Found lots of errors related to files not found. Below is a list of some of those errors.

ForkJoinPool-2-worker-27 ERROR [c.a.j.migration.preflight.PreflightPersistenceManager] File not found for Pre-flight CheckResult with executionId 9f934a21df47caa6b3d13106ceaf63613bfd28f0 and type ProjectKeyAndNameConflict

ForkJoinPool-2-worker-27 ERROR [c.a.j.migration.preflight.PreflightPersistenceManager] File not found for Pre-flight CheckResult with executionId 9f934a21df47caa6b3d13106ceaf63613bfd28f0 and type ProjectCloudExistence

ForkJoinPool-2-worker-9 ERROR [c.a.j.migration.preflight.PreflightPersistenceManager] File not found for Pre-flight CheckResult with executionId 496ecccd3317934d564c788da6d15565d2d61812 and type ProjectKeyAndNameConflict

ForkJoinPool-2-worker-27 ERROR [c.a.j.migration.preflight.PreflightPersistenceManager] File not found for Pre-flight CheckResult with executionId 9f934a21df47caa6b3d13106ceaf63613bfd28f0 and type AdvancedRoadmapsProjectMigratedConflict

Please advise what we have to do. Thank you so much!