diff --git a/calcifer.project b/calcifer.project
index 459cb9b..be32f9f 100644
--- a/calcifer.project
+++ b/calcifer.project
@@ -1 +1 @@
-{"categories":[{"name":"to do","content":[{"name":"add id to textarea per tab","description":"to improve undo, make each code area of each tab have a unique id (no more undo into another tab)","id":1},{"name":"bug project","description":"when switching tabs between two project file, if item window is open it crashes","id":1},{"name":"update workflow .yml","description":"make a workflow compiling the calcifer and put the linux in calcifer-{version}\nand the windows in calcifer_windows_{version}\n\nupdate nix\nupdate jiji","id":5},{"name":"open dir in tree ?","description":"// Hello there","id":2},{"name":"file tree id ?","description":"// Hello there","id":1}]},{"name":"in progress","content":[{"name":"export copy paste fix","description":"// Hello there","id":1}]},{"name":"done","content":[{"name":"move .project file","description":"// Hello there","id":4},{"name":"move config","description":"config from .calcifer/save.json\nto .config/calcifer/state.json","id":1}]},{"name":"+","content":[]}]}
\ No newline at end of file
+{"categories":[{"name":"to do","content":[{"name":"bug project","description":"when switching tabs between two project file, if item window is open it crashes","id":1},{"name":"update workflow .yml","description":"make a workflow compiling the calcifer and put the linux in calcifer-{version}\nand the windows in calcifer_windows_{version}\n\nupdate nix\nupdate jiji","id":5},{"name":"open dir in tree ?","description":"// Hello there","id":2},{"name":"fix tab title","description":"// Hello there","id":2}]},{"name":"in progress","content":[{"name":"export copy paste fix","description":"// Hello there","id":1}]},{"name":"done","content":[{"name":"move .project file","description":"// Hello there","id":4},{"name":"move config","description":"config from .calcifer/save.json\nto .config/calcifer/state.json","id":1},{"name":"add id to textarea per tab","description":"to improve undo, make each code area of each tab have a unique id (no more undo into another tab)","id":1},{"name":"file tree id ?","description":"// Hello there","id":1}]},{"name":"+","content":[]}]}
\ No newline at end of file
diff --git a/src/core/app.rs b/src/core/app.rs
index 89ef185..549a5bc 100644
--- a/src/core/app.rs
+++ b/src/core/app.rs
@@ -209,10 +209,13 @@ impl Calcifer {
 
 		if let Some(folder_content) = &file.folder_content {
 			let mut check_for_update: bool = false;
-			let collapsing_response = egui::CollapsingHeader::new(file.name.clone())
-				.default_open(self.tree_dir_opened.contains(&file.name))
+			let file_id = panels::get_file_id(&file);
+			
+			let collapsing_response = egui::CollapsingHeader::new(&file.name.clone())
+				.id_source(&file_id)
+				.default_open(self.tree_dir_opened.contains(&file_id))
 				.show(ui, |ui| {
-					if !self.tree_dir_opened.contains(&file.name) {
+					if !self.tree_dir_opened.contains(&file_id) {
 						return;
 					}
 					for deeper_file in folder_content {
@@ -222,9 +225,9 @@ impl Calcifer {
 					}
 				});
 			if collapsing_response.fully_closed() {
-				self.tree_dir_opened.retain(|s| s != &file.name);
-			} else if !self.tree_dir_opened.contains(&file.name) {
-				self.tree_dir_opened.push(file.name.clone());
+				self.tree_dir_opened.retain(|s| s != &file_id);
+			} else if !self.tree_dir_opened.contains(&file_id) {
+				self.tree_dir_opened.push(file_id);
 				return !file.content_checked;
 			}
 			return check_for_update;
diff --git a/src/panels/file_tree.rs b/src/panels/file_tree.rs
index 8c84723..5b0302a 100644
--- a/src/panels/file_tree.rs
+++ b/src/panels/file_tree.rs
@@ -35,7 +35,7 @@ impl FileEntry {
 }
 
 pub fn update_file_tree(file: FileEntry, opened_dirs: Vec<String>) -> FileEntry {
-	if opened_dirs.contains(&file.name) {
+	if opened_dirs.contains(&get_file_id(&file)) {
 		if let Some(folder_content) = &file.folder_content {
 			if !file.content_checked {
 				return generate_folder_entry(&file.path);
@@ -58,6 +58,10 @@ pub fn update_file_tree(file: FileEntry, opened_dirs: Vec<String>) -> FileEntry
 	}
 }
 
+pub fn get_file_id(file: &FileEntry) -> String {
+	format!("#{}",file.path.clone().display())
+}
+
 pub fn generate_folder_entry(path: &Path) -> FileEntry {
 	if let Some(file_name) = path.file_name() {
 		let name = file_name.to_string_lossy().into_owned();