diff --git a/telebot/__init__.py b/telebot/__init__.py
index 7719fa0..ee1cc55 100644
--- a/telebot/__init__.py
+++ b/telebot/__init__.py
@@ -4281,10 +4281,8 @@ class TeleBot:
         """
         if contains_masks is not None:
             logger.warning('The parameter "contains_masks" is deprecated, use "sticker_type" instead')
-            if contains_masks:
-                sticker_type = 'mask'
-            else:
-                sticker_type = 'regular'
+            if sticker_type is None:
+               sticker_type = 'mask' if contains_masks else 'regular'
 
         return apihelper.create_new_sticker_set(
             self.token, user_id, name, title, emojis, png_sticker, tgs_sticker, 
diff --git a/telebot/async_telebot.py b/telebot/async_telebot.py
index 72561fa..f8be968 100644
--- a/telebot/async_telebot.py
+++ b/telebot/async_telebot.py
@@ -5119,11 +5119,9 @@ class AsyncTeleBot:
         """
         if contains_masks is not None:
             logger.warning('The parameter "contains_masks" is deprecated, use "sticker_type" instead')
-            if contains_masks:
-                sticker_type = 'mask'
-            else:
-                sticker_type = 'regular'
-
+            if sticker_type is None:
+               sticker_type = 'mask' if contains_masks else 'regular'
+               
         return await asyncio_helper.create_new_sticker_set(
             self.token, user_id, name, title, emojis, png_sticker, tgs_sticker, 
             mask_position, webm_sticker, sticker_type)