recover deleted test execution records

Unfortunately, you cannot recover archived (deleted) test artifacts. However, you can retrieve a feed of test artifacts that includes archived test artifact(s) using the RQM Reportable REST API and Poster (https://jazz.net/wiki/bin/view/Main/RQMUsingPoster). For more information, see https://jazz.net/wiki/bin/view/Main/RqmApi#includeArchived. Once you GET the archived test artifact, you can POST/PUT each test artifact.

See this article Recovering Collaborative Lifecyle Management application data for production restore - Library: Articles - Jazz Community Site