Description of problem:

Removal of Triggers has some issue

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

1. Create a pipeline
2. Add a trigger to the pipeline
3. Remove the trigger from the pipeline

Actual results:

An error occurred while removing the trigger

Expected results:

No error should occur while removing the pipeline.

Reproducibility (Always/Intermittent/Only Once):

Always

Build Details:

4.8

Additional info: