SymptomsMigration fails with the following error:
ERROR: (SSL certificate object 'default certificate') Execution of /opt/psa/admin/plib/api-cli/certificate.php --create default\ certificate -cert-file /opt/psa/PMM/tmp/pmm-cert-8NZ0Wu -key-file /opt/psa/PMM/tmp/pmm-privkey-QcLYf5 -admin failed with return code 1.
Unable to create certificate "default certificate": certificate with such name already exists
CauseCertificate with the name "default certificate" exists on the both Parallels Plesk Panel servers. It is a default certificate name.
ResolutionEdit the name of the default certificate at Home > Server Tools > Change Properties of SSL Certificate default certificate as shown on the below screeshot either on the source or on the destination server and retry migration once again: