From c1adf2e8af005a27de8a6ff0eaa7812424aa2128 Mon Sep 17 00:00:00 2001
From: 6543 <6543@obermui.de>
Date: Wed, 13 May 2026 21:23:33 +0200
Subject: [PATCH] saveWorkflowsFromPipelineBuilder: check for pre-loaded
 workflows (#6474)

---
 server/pipeline/items.go | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/server/pipeline/items.go b/server/pipeline/items.go
index 420c998488..731e1da6fd 100644
--- a/server/pipeline/items.go
+++ b/server/pipeline/items.go
@@ -210,9 +210,12 @@ func saveWorkflowsFromPipelineBuilder(store store.Store, pipeline *model.Pipelin
 		}
 	}
 
-	// the workflows in the pipeline should be empty as only we do populate them,
-	// but if a pipeline was already loaded form database it might contain things, so we just clean it
-	pipeline.Workflows = nil
+	// The workflows in the pipeline should be empty, only we populate them.
+	// But if a pipeline was already loaded from the database and contains workflows,
+	// we error out to prevent harm.
+	if pipeline.Workflows != nil {
+		return nil, errors.New("cannot save new workflows from pipeline builder: pipeline already has workflows loaded")
+	}
 
 	for _, item := range pipelineItems {
 		workflow := &model.Workflow{