diff --git a/packages/server/src/api/workflows.js b/packages/server/src/api/workflows.js
index ff1dadd..5adc062 100644
--- a/packages/server/src/api/workflows.js
+++ b/packages/server/src/api/workflows.js
@@ -706,15 +706,14 @@ export default function workflowsPluginFactory(registry) {
         return reply.code(err.statusCode ?? 400).send({ error: err.message });
       }
       const raw = fsStore.readWorkflowYaml(owner, file);
-      if (raw == null) {
-        return reply.code(404).send({ error: "workflow not found" });
-      }
       let name = null;
-      try {
-        const parsed = yaml.parse(raw);
-        name = parsed?.name ?? null;
-      } catch {
-        // ignore
+      if (raw != null) {
+        try {
+          const parsed = yaml.parse(raw);
+          name = parsed?.name ?? null;
+        } catch {
+          // ignore
+        }
       }
       try {
         const item = await moveWorkflowToTrash({
diff --git a/packages/server/test/workflow-history-smoke.js b/packages/server/test/workflow-history-smoke.js
index 3694988..353ccee 100644
--- a/packages/server/test/workflow-history-smoke.js
+++ b/packages/server/test/workflow-history-smoke.js
@@ -136,6 +136,18 @@ const warnings = collectWorkflowWarnings(
 );
 assert.ok(warnings.warnings.some((w) => w.code === "unknown_script"));
 
+const ghostFile = newWorkflowFilename();
+fsStore.writeRegisters(owner, [file, ghostFile]);
+const ghostTrash = await moveWorkflowToTrash({
+  workflowId: workflowIdFromFile(ghostFile),
+  owner,
+  file: ghostFile,
+  name: null,
+});
+assert.equal(ghostTrash, null);
+assert.ok(!fsStore.readRegisters(owner).includes(ghostFile));
+assert.ok(fsStore.readRegisters(owner).includes(file));
+
 const trashed = await moveWorkflowToTrash({
   workflowId,
   owner,
diff --git a/packages/server/workflow-trash.js b/packages/server/workflow-trash.js
index f0cb464..6984275 100644
--- a/packages/server/workflow-trash.js
+++ b/packages/server/workflow-trash.js
@@ -62,29 +62,49 @@ export async function isInTrash(owner, file) {
   return Boolean(row);
 }
 
+function unregisterWorkflow(owner, file) {
+  const registered = fsStore.readRegisters(owner).filter((f) => f !== file);
+  fsStore.writeRegisters(owner, registered);
+}
+
 /**
- * Soft-delete: move YAML to trash dir, unregister, keep revision history.
+ * Soft-delete: unregister, move YAML to trash when present, keep revision history.
+ * Missing YAML (ghost register entries) is still unregistered so it leaves the list.
  * @param {{
  *   workflowId: string,
  *   owner: string,
  *   file: string,
  *   name?: string | null,
  * }} opts
+ * @returns {Promise<ReturnType<typeof rowToItem> | null>} trash item, or null if there was no file to keep
  */
 export async function moveWorkflowToTrash(opts) {
+  unregisterWorkflow(opts.owner, opts.file);
+
   const sourcePath = path.join(WORKFLOWS_DIR, opts.owner, opts.file);
   if (!fs.existsSync(sourcePath)) {
-    const err = new Error("workflow not found");
-    err.statusCode = 404;
-    throw err;
+    const existing = await db("workflow_trash")
+      .where({ owner: opts.owner, file: opts.file })
+      .first();
+    return existing ? rowToItem(existing) : null;
   }
 
   const trashPath = trashFilePath(opts.owner, opts.file);
   fs.mkdirSync(path.dirname(trashPath), { recursive: true });
   fs.renameSync(sourcePath, trashPath);
 
-  const registered = fsStore.readRegisters(opts.owner).filter((f) => f !== opts.file);
-  fsStore.writeRegisters(opts.owner, registered);
+  const existing = await db("workflow_trash")
+    .where({ owner: opts.owner, file: opts.file })
+    .first();
+  if (existing) {
+    await db("workflow_trash").where({ id: existing.id }).update({
+      workflow_id: opts.workflowId,
+      name: opts.name ?? existing.name ?? null,
+      deleted_at: nowIso(),
+      trash_path: trashPath,
+    });
+    return rowToItem(await db("workflow_trash").where({ id: existing.id }).first());
+  }
 
   const id = randomUUID();
   const deleted_at = nowIso();