diff --git a/metagpt/roles/product_manager.py b/metagpt/roles/product_manager.py
index fbe139a99..4eb1d249a 100644
--- a/metagpt/roles/product_manager.py
+++ b/metagpt/roles/product_manager.py
@@ -9,7 +9,7 @@
 
 from metagpt.actions import UserRequirement, WritePRD
 from metagpt.actions.prepare_documents import PrepareDocuments
-from metagpt.roles.role import Role
+from metagpt.roles.role import Role, RoleReactMode
 from metagpt.utils.common import any_to_name
 
 
@@ -35,7 +35,8 @@ class ProductManager(Role):
 
         self.set_actions([PrepareDocuments, WritePRD])
         self._watch([UserRequirement, PrepareDocuments])
-        self.todo_action = any_to_name(PrepareDocuments)
+        self.rc.react_mode = RoleReactMode.BY_ORDER
+        self.todo_action = any_to_name(WritePRD)
 
     async def _think(self) -> bool:
         """Decide what to do"""
diff --git a/tests/metagpt/roles/test_product_manager.py b/tests/metagpt/roles/test_product_manager.py
index 59b5aa81a..9a28a3296 100644
--- a/tests/metagpt/roles/test_product_manager.py
+++ b/tests/metagpt/roles/test_product_manager.py
@@ -10,7 +10,6 @@ import json
 import pytest
 
 from metagpt.actions import WritePRD
-from metagpt.actions.prepare_documents import PrepareDocuments
 from metagpt.const import REQUIREMENT_FILENAME
 from metagpt.context import Context
 from metagpt.logs import logger
@@ -30,12 +29,8 @@ async def test_product_manager(new_filename):
         rsp = await product_manager.run(MockMessages.req)
         assert context.git_repo
         assert context.repo
-        assert rsp.cause_by == any_to_str(PrepareDocuments)
-        assert REQUIREMENT_FILENAME in context.repo.docs.changed_files
-
-        # write prd
-        rsp = await product_manager.run(rsp)
         assert rsp.cause_by == any_to_str(WritePRD)
+        assert REQUIREMENT_FILENAME in context.repo.docs.changed_files
         logger.info(rsp)
         assert len(rsp.content) > 0
         doc = list(rsp.instruct_content.docs.values())[0]