diff --git a/toonz/sources/toonz/levelcommand.cpp b/toonz/sources/toonz/levelcommand.cpp
index 4ae2d12..ab63c22 100644
--- a/toonz/sources/toonz/levelcommand.cpp
+++ b/toonz/sources/toonz/levelcommand.cpp
@@ -334,7 +334,7 @@ void revertTo(bool isCleanedUp) {
       delete undo;
     else {
       TUndoManager::manager()->add(undo);
-      sl->setDirtyFlag(true);
+      if (isCleanedUp) sl->setDirtyFlag(true);
     }
     app->getCurrentLevel()->notifyLevelChange();
   }
@@ -390,7 +390,7 @@ void revertTo(bool isCleanedUp) {
         delete undo;
       else {
         TUndoManager::manager()->add(undo);
-        sl->setDirtyFlag(true);
+        if (isCleanedUp) sl->setDirtyFlag(true);
       }
     }
     TUndoManager::manager()->endBlock();
diff --git a/toonz/sources/toonzlib/txshsimplelevel.cpp b/toonz/sources/toonzlib/txshsimplelevel.cpp
index 21fdbae..ad03350 100644
--- a/toonz/sources/toonzlib/txshsimplelevel.cpp
+++ b/toonz/sources/toonzlib/txshsimplelevel.cpp
@@ -119,6 +119,7 @@ bool isAreadOnlyLevel(const TFilePath &path) {
   if (path.getDots() == "." ||
       (path.getDots() == ".." &&
        (path.getType() == "tlv" || path.getType() == "tpl"))) {
+    if (path.getType() == "psd") return true;
     if (!TSystem::doesExistFileOrLevel(path)) return false;
     TFileStatus fs(path);
     return !fs.isWritable();