diff --git a/client/app_config.cpp b/client/app_config.cpp
index 13b2a75ca7..e65bee018c 100644
--- a/client/app_config.cpp
+++ b/client/app_config.cpp
@@ -191,6 +191,7 @@ void max_concurrent_init() {
 // It will be restored on next scheduler RPC.
 //
 static void clear_app_config(PROJECT* p) {
+    p->app_configs.clear();
     for (unsigned int i=0; i<gstate.apps.size(); i++) {
         APP* app = gstate.apps[i];
         if (app->project != p) continue;
diff --git a/client/app_config.h b/client/app_config.h
index d2e9eac063..81c6c111d2 100644
--- a/client/app_config.h
+++ b/client/app_config.h
@@ -54,6 +54,10 @@ struct APP_CONFIGS {
     int parse(XML_PARSER&, PROJECT*);
     int parse_file(FILE*, PROJECT*);
     void config_app_versions(PROJECT*, bool show_warnings);
+    void clear() {
+        app_configs.clear();
+        app_version_configs.clear();
+    }
 };
 
 extern bool have_max_concurrent;