fixing duplicated entries in userdb.componentType and userdb.QC.stages

Short description

This MR will fix observation reported by @fcrescio that duplicated entries are present in userdb.componentType and potentially in userdb.QC.stages.

More detailed description

Checklist

• add tests
• label this MR
• assign reviewers
• update documentation and changelog
• link related issues and close with this MR via "closes #"