request.is_json() does not exist in old flask versions if method == GET

server.py

@@ -390,7 +390,7 @@ def edit(prefix='', ignore=[]):
 		prefix = request.args['prefix']
 	modify('BEGIN')
 	changes = request.values.items()
-	if request.is_json:
+	if (request.method == 'POST') and (request.is_json):
 		changes = request.get_json().items()
 	for key, val in changes:
 		if key in ignore: