diff --git a/src/main/scala/radiance/memory/VortexCache.scala b/src/main/scala/radiance/memory/VortexCache.scala
index e3015ce..480b0d4 100644
--- a/src/main/scala/radiance/memory/VortexCache.scala
+++ b/src/main/scala/radiance/memory/VortexCache.scala
@@ -606,7 +606,7 @@ class NewSourceGenerator[T <: Data](
   oldestMetadata := occupancyTable(oldestIndex).meta
   oldestAge := occupancyTable(oldestIndex).age
   assert(
-    oldestAge <= 2000.U,
+    oldestAge <= 10000.U,
     "One id in the SourceGen is not released for long time, potential bug !"
   )