Delete pipeline via API fails with 403 Forbidden

I am a maintainer on a project. I want to clear out the old pipelines. I created a personal access token with all permissions. The script runs correctly but it doesn’t delete any pipelines returning this error:

Deleting pipeline 134566632
{“message”:“403 Forbidden”}Deleting pipeline 134607716
{“message”:“403 Forbidden”}Deleting pipeline 134932351
{“message”:“403 Forbidden”}Deleting pipeline 134932931
and on and on…

Any thoughts would be appreciated!

Thanks in advance

-Andy