This means you had this pipeline set up previously, but then have deleted it.
To avoid ad cost data duplication in re-created pipelines, we never physically delete the pipelines. So when creating a deleted pipeline again, you just restore it with the same ad service access and Google Analytics dataset provided.
As the result, you can view the previous import history from this pipeline.
Note:Different agency accesses to one and the same customer account are being rendered as identical.