diff --git a/cmsis-pack/GorgonMeducer.perf_counter.pdsc b/cmsis-pack/GorgonMeducer.perf_counter.pdsc
index b5d15e8..57f4520 100644
--- a/cmsis-pack/GorgonMeducer.perf_counter.pdsc
+++ b/cmsis-pack/GorgonMeducer.perf_counter.pdsc
@@ -28,8 +28,6 @@
     </release>
     <release date="2022-11-01" version="1.9.10" url="https://github.com/GorgonMeducer/perf_counter/raw/1115e60d61940b7da833c841d2f4e1bbbcb22793/cmsis-pack/GorgonMeducer.perf_counter.1.9.10.pack">
       - Fix the support for RT-Thread
-    </release>
-    <release date="2022-09-26" version="1.9.9a" url="https://github.com/GorgonMeducer/perf_counter/raw/77134b23f9259e3ec4215eb30096c3474ed1d01d/cmsis-pack/GorgonMeducer.perf_counter.1.9.9a.pack">
       - Improve the way to import systick wrapper
       - Add get_system_us to avoid 64bit integer divider.
       - Minor Update