SDS Synchronisation error

In our organization, we have nearly 18,252 Teams to create. When syncing SDS with CSV files, for some Teams we have errors of different types. For example, for a group, we have the following errors:
Group Name: 2020-058-GHE600-62
SectionTeamify => 1 error
StudentEnrollment => 22 errors
TeacherRoster => 1 error
TeacherRosterToSectionMember => 1 error

What is the cause of these errors?