I have a PA node registered in OBAS. From PA side I deleted some service templates, then in OBAS went
Top > Service Director > Parallels Automation Manager > Service Templates and pressed "Synchronize service templates".
The task completed successfully, however, deleted templates are still visible in OBAS.
The behaviour is caused by the software issue PBAS-29474 and is fixed since OBAS version 4.5.4.
To resolve the issue, please upgrade to the latest product version as described in the following KB article: