Delete the existing certificate:
nex-cli certs:delete CERT_NAME
Create a new certificate, uploading the files at the same time:
nex-cli certs:create CERT_NAME ORIGIN --cert CERT_FILE --bundle BUNDLE_FILE --privkey KEY_FILE
Delete the existing certificate:
nex-cli certs:delete CERT_NAME
Create a new certificate, uploading the files at the same time:
nex-cli certs:create CERT_NAME ORIGIN --cert CERT_FILE --bundle BUNDLE_FILE --privkey KEY_FILE