diff --git a/src/runboat/api.py b/src/runboat/api.py
index 2e98768..f6d2b19 100644
--- a/src/runboat/api.py
+++ b/src/runboat/api.py
@@ -115,7 +115,7 @@ async def undeploy_builds(
 async def trigger_branch(repo: str, branch: str) -> None:
     """Trigger build for a branch."""
     commit_info = await github.get_branch_info(repo, branch)
-    await controller.deploy_or_start(commit_info)
+    await controller.deploy_commit(commit_info)
 
 
 @router.post(
@@ -125,7 +125,7 @@ async def trigger_branch(repo: str, branch: str) -> None:
 async def trigger_pull(repo: str, pr: int) -> None:
     """Trigger build for a pull request."""
     commit_info = await github.get_pull_info(repo, pr)
-    await controller.deploy_or_start(commit_info)
+    await controller.deploy_commit(commit_info)
 
 
 async def _build_by_name(name: str) -> models.Build:
diff --git a/src/runboat/controller.py b/src/runboat/controller.py
index 50f7ec0..18893ff 100644
--- a/src/runboat/controller.py
+++ b/src/runboat/controller.py
@@ -84,17 +84,16 @@ class Controller:
     def undeploying(self) -> int:
         return self.db.count_by_status(BuildStatus.undeploying)
 
-    async def deploy_or_start(self, commit_info: CommitInfo) -> None:
+    async def deploy_commit(self, commit_info: CommitInfo) -> None:
+        """Deploy build for a commit, or do nothing if biuld already exist."""
         build = self.db.get_for_commit(
             repo=commit_info.repo,
             target_branch=commit_info.target_branch,
             pr=commit_info.pr,
             git_commit=commit_info.git_commit,
         )
-        if build is not None:
-            await build.start()
-            return
-        await Build.deploy(commit_info)
+        if build is None:
+            await Build.deploy(commit_info)
 
     async def get_build(self, build_name: str, db_only: bool = True) -> Build | None:
         build = self.db.get(build_name)
diff --git a/src/runboat/webhooks.py b/src/runboat/webhooks.py
index ce74a67..c2b6b49 100644
--- a/src/runboat/webhooks.py
+++ b/src/runboat/webhooks.py
@@ -32,7 +32,7 @@ async def receive_payload(
                 )
                 return
             background_tasks.add_task(
-                controller.deploy_or_start,
+                controller.deploy_commit,
                 CommitInfo(
                     repo=repo,
                     target_branch=target_branch,
@@ -52,7 +52,7 @@ async def receive_payload(
             )
             return
         background_tasks.add_task(
-            controller.deploy_or_start,
+            controller.deploy_commit,
             CommitInfo(
                 repo=repo,
                 target_branch=target_branch,
diff --git a/tests/test_webhook.py b/tests/test_webhook.py
index f5ce19c..143b5cf 100644
--- a/tests/test_webhook.py
+++ b/tests/test_webhook.py
@@ -24,7 +24,7 @@ def test_webhook_github_push(mocker: MockerFixture) -> None:
     )
     response.raise_for_status()
     mock.assert_called_with(
-        controller.deploy_or_start,
+        controller.deploy_commit,
         CommitInfo(
             repo="oca/mis-builder",
             target_branch="15.0",
@@ -75,7 +75,7 @@ def test_webhook_github_pr(action: str, mocker: MockerFixture) -> None:
     )
     response.raise_for_status()
     mock.assert_called_with(
-        controller.deploy_or_start,
+        controller.deploy_commit,
         CommitInfo(
             repo="oca/mis-builder",
             target_branch="15.0",