diff -r 9c6ebf67afe9 -r b5f740a87af4 src/main/java/de/uapcore/lightpit/modules/ProjectsModule.java
--- a/src/main/java/de/uapcore/lightpit/modules/ProjectsModule.java	Sat Aug 29 17:28:24 2020 +0200
+++ b/src/main/java/de/uapcore/lightpit/modules/ProjectsModule.java	Sat Aug 29 17:32:59 2020 +0200
@@ -158,10 +158,14 @@
         final int pid = syncParamWithSession(req, PARAMETER_SELECTED_PROJECT, SESSION_ATTR_SELECTED_PROJECT);
         if (pid >= 0) {
             final var project = projectDao.find(pid);
-            final var info = new ProjectInfo(project);
-            info.setVersions(versionDao.list(project));
-            info.setIssueSummary(projectDao.getIssueSummary(project));
-            viewModel.setProjectInfo(info);
+            if (project == null) {
+                req.setAttribute(SESSION_ATTR_SELECTED_PROJECT, -1);
+            } else {
+                final var info = new ProjectInfo(project);
+                info.setVersions(versionDao.list(project));
+                info.setIssueSummary(projectDao.getIssueSummary(project));
+                viewModel.setProjectInfo(info);
+            }
         }
 
         // Select Version