diff --git a/guix-data-service/jobs/load-new-guix-revision.scm b/guix-data-service/jobs/load-new-guix-revision.scm
index 7f00c22..bbdc7fc 100644
--- a/guix-data-service/jobs/load-new-guix-revision.scm
+++ b/guix-data-service/jobs/load-new-guix-revision.scm
@@ -575,7 +575,9 @@ WHERE job_id = $1")
 
                   ;; Clean the cached store connections, as there are caches
                   ;; associated with these that take up lots of memory
-                  (inferior-eval '(hash-clear! %store-table) inf)
+                  (inferior-eval
+                   '(when (defined? '%store-table) (hash-clear! %store-table))
+                   inf)
 
                   warnings))))))
       checkers))))