diff --git a/openpype/hosts/blender/api/render_lib.py b/openpype/hosts/blender/api/render_lib.py
index 17b9d926ec..bb35dd44ea 100644
--- a/openpype/hosts/blender/api/render_lib.py
+++ b/openpype/hosts/blender/api/render_lib.py
@@ -101,7 +101,7 @@ def set_render_format(ext, multilayer):
 
 
 def set_render_passes(settings, renderer):
-    aov_list = settings["blender"]["RenderSettings"]["aov_list"]
+    aov_list = set(settings["blender"]["RenderSettings"]["aov_list"])
     custom_passes = settings["blender"]["RenderSettings"]["custom_passes"]
 
     # Common passes for both renderers
@@ -175,7 +175,7 @@ def set_render_passes(settings, renderer):
         aov.type = (cp["value"]
                     if AYON_SERVER_ENABLED else cp[1].get("type", "VALUE"))
 
-    return aov_list, custom_passes
+    return list(aov_list), custom_passes
 
 
 def _create_aov_slot(name, aov_sep, slots, rpass_name, multi_exr, output_path):