diff --git a/server.py b/server.py
index a8e83b4..1f617d2 100644
--- a/server.py
+++ b/server.py
@@ -98,7 +98,8 @@ def alter(partID):
             datasheet_file = request.files['datasheet-file']
             datasheet_filename = secure_filename(datasheet_file.filename)
             datasheet_file.save('/srv/datasheets/' + datasheet_filename)
-            os.remove('/srv/datasheets/' + l[0]['datasheet'])
+            if l[0]['datasheet'] != None:
+                os.remove('/srv/datasheets/' + l[0]['datasheet'])
         else:
             datasheet_filename = l[0]['datasheet']
         s += 'where id=:id;'
diff --git a/static/script.js b/static/script.js
index 9916154..7c18832 100644
--- a/static/script.js
+++ b/static/script.js
@@ -203,7 +203,7 @@ function show_part_info(partID) {
 		$('#quantity-info').text(text_filter(data.quantity));
 		$('#notes-info').text(text_filter(data.notes));
 		if (data.datasheet != null)
-			$('#datasheet-info').append($('<a href="https://www.elab.kth.se/parts/getfile/' + data.datasheet.substring(0, data.datasheet.length - 4) + '"><i class="fa fa-file-text" aria-hidden="true"></i></a>'));
+			$('#datasheet-info').html($('<a href="https://www.elab.kth.se/parts/getfile/' + data.datasheet.substring(0, data.datasheet.length - 4) + '"><i class="fa fa-file-text" aria-hidden="true"></i></a>'));
 		else
 			$('#datasheet-info').text(' ');
 		$('#edit-button').click(function() {