diff --git a/swad_changelog.h b/swad_changelog.h
index dacf0fea4..60a4d82e5 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -553,7 +553,7 @@ enscript -2 --landscape --color --file-align=2 --highlight --line-numbers -o - *
 En OpenSWAD:
 ps2pdf source.ps destination.pdf
 */
-#define Log_PLATFORM_VERSION	"SWAD 20.36.8 (2021-02-07)"
+#define Log_PLATFORM_VERSION	"SWAD 20.36.9 (2021-02-07)"
 #define CSS_FILE		"swad20.33.9.css"
 #define JS_FILE			"swad20.6.2.js"
 /*
@@ -601,6 +601,7 @@ TODO: DNI de un estudiante sale err
 TODO: BUG: Cuando un tipo de grupo sólo tiene un grupo, inscribirse es voluntario, el estudiante sólo puede pertenecer a un grupo, y se inscribe en él, debería poder desapuntarse. Ahora no puede.
 TODO: Salvador Romero Cortés: @acanas opción para editar posts
 
+	Version 20.36.9:  Feb 27, 2021  Query moved to module swad_timeline_database. (305233 lines)
 	Version 20.36.8:  Feb 27, 2021  Function moved to module swad_timeline_database. (305215 lines)
 	Version 20.36.7:  Feb 27, 2021  Query moved to module swad_timeline_database. (305212 lines)
 	Version 20.36.6:  Feb 27, 2021  Queries moved to module swad_timeline_database. (305195 lines)
diff --git a/swad_timeline_database.c b/swad_timeline_database.c
index 746b35853..93816b58b 100644
--- a/swad_timeline_database.c
+++ b/swad_timeline_database.c
@@ -76,13 +76,34 @@ long TL_DB_CreateNewNote (TL_Not_NoteType_t NoteType,long Cod,
 
 void TL_DB_MarkNoteAsUnavailable (TL_Not_NoteType_t NoteType,long Cod)
   {
-   /***** Mark the note as unavailable *****/
+   /***** Mark note as unavailable *****/
    DB_QueryUPDATE ("can not mark note as unavailable",
 		   "UPDATE tl_notes SET Unavailable='Y'"
 		   " WHERE NoteType=%u AND Cod=%ld",
 		   (unsigned) NoteType,Cod);
   }
 
+/*****************************************************************************/
+/***** Mark possible notes involving children of a folder as unavailable *****/
+/*****************************************************************************/
+
+void TL_DB_MarkNotesChildrenOfFolderAsUnavailable (TL_Not_NoteType_t NoteType,
+                                                   Brw_FileBrowser_t FileBrowser,
+                                                   long Cod,
+                                                   const char *Path)
+  {
+   /***** Mark notes as unavailable *****/
+   DB_QueryUPDATE ("can not mark notes as unavailable",
+		   "UPDATE tl_notes SET Unavailable='Y'"
+		   " WHERE NoteType=%u AND Cod IN"
+		   " (SELECT FilCod FROM files"
+		   " WHERE FileBrowser=%u AND Cod=%ld"
+		   " AND Path LIKE '%s/%%' AND Public='Y')",	// Only public files
+		   (unsigned) NoteType,
+		   (unsigned) FileBrowser,Cod,
+		   Path);
+  }
+
 /*****************************************************************************/
 /**** Insert note in temporary tables used to not get notes already shown ****/
 /*****************************************************************************/
diff --git a/swad_timeline_database.h b/swad_timeline_database.h
index 0a952d3ac..26ce65382 100644
--- a/swad_timeline_database.h
+++ b/swad_timeline_database.h
@@ -28,6 +28,7 @@
 /*****************************************************************************/
 
 #include "swad_database.h"
+#include "swad_file_browser.h"
 #include "swad_timeline_note.h"
 #include "swad_timeline_post.h"
 
@@ -47,6 +48,10 @@
 long TL_DB_CreateNewNote (TL_Not_NoteType_t NoteType,long Cod,
                           long PublisherCod,long HieCod);
 void TL_DB_MarkNoteAsUnavailable (TL_Not_NoteType_t NoteType,long Cod);
+void TL_DB_MarkNotesChildrenOfFolderAsUnavailable (TL_Not_NoteType_t NoteType,
+                                                   Brw_FileBrowser_t FileBrowser,
+                                                   long Cod,
+                                                   const char *Path);
 void TL_DB_InsertNoteInJustRetrievedNotes (long NotCod);
 void TL_DB_InsertNoteInVisibleTimeline (long NotCod);
 
diff --git a/swad_timeline_note.c b/swad_timeline_note.c
index c78d04b61..1c929b383 100644
--- a/swad_timeline_note.c
+++ b/swad_timeline_note.c
@@ -951,7 +951,6 @@ void TL_Not_MarkNotesChildrenOfFolderAsUnavailable (const char *Path)
   {
    extern const Brw_FileBrowser_t Brw_FileBrowserForDB_files[Brw_NUM_TYPES_FILE_BROWSER];
    Brw_FileBrowser_t FileBrowser = Brw_FileBrowserForDB_files[Gbl.FileBrowser.Type];
-   long Cod = Brw_GetCodForFiles ();
    TL_Not_NoteType_t NoteType;
 
    switch (FileBrowser)
@@ -994,15 +993,9 @@ void TL_Not_MarkNotesChildrenOfFolderAsUnavailable (const char *Path)
 	    default:
 	       return;
 	   }
-         DB_QueryUPDATE ("can not mark notes as unavailable",
-			 "UPDATE tl_notes SET Unavailable='Y'"
-		         " WHERE NoteType=%u AND Cod IN"
-	                 " (SELECT FilCod FROM files"
-			 " WHERE FileBrowser=%u AND Cod=%ld"
-			 " AND Path LIKE '%s/%%' AND Public='Y')",	// Only public files
-			 (unsigned) NoteType,
-			 (unsigned) FileBrowser,Cod,
-			 Path);
+         TL_DB_MarkNotesChildrenOfFolderAsUnavailable (NoteType,
+                                                       FileBrowser,Brw_GetCodForFiles (),
+                                                       Path);
          break;
       default:
 	 break;