After deleted a pipeline, not able to add new one.
Can you please elaborate on what you mean by not being able to add a new pipeline? What error are you running into?
Pipelines is configured via the bitbucket-pipelines.yml file, so creating a new pipeline is as simple as adding extra configuration in the YML file.
I'm going to close off this issue. Please feel free to reopen this issue if you're still experiencing problems.