diff --git a/api/onnx_web/params.py b/api/onnx_web/params.py
index 938751df..db23414a 100644
--- a/api/onnx_web/params.py
+++ b/api/onnx_web/params.py
@@ -157,7 +157,7 @@ class ImageParams:
         lpw: bool = False,
         eta: float = 0.0,
         batch: int = 1,
-        inversion: str = None,
+        inversion: Optional[str] = None,
     ) -> None:
         self.model = model
         self.scheduler = scheduler
diff --git a/api/onnx_web/serve.py b/api/onnx_web/serve.py
index bcd7a2dc..fb95d8ef 100644
--- a/api/onnx_web/serve.py
+++ b/api/onnx_web/serve.py
@@ -159,8 +159,11 @@ def pipeline_from_request() -> Tuple[DeviceParams, ImageParams, Size]:
     scheduler = get_from_map(
         request.args, "scheduler", pipeline_schedulers, get_config_value("scheduler")
     )
-    inversion = get_not_empty(request.args, "inversion", get_config_value("inversion"))
-    inversion_path = get_model_path(inversion)
+
+    inversion = request.args.get("inversion", None)
+    inversion_path = None
+    if inversion is not None and inversion.strip() != "":
+        inversion_path = get_model_path(inversion)
 
     # image params
     prompt = get_not_empty(request.args, "prompt", get_config_value("prompt"))
diff --git a/common/scripts/copy-pr-to-gitlab.sh b/common/scripts/copy-pr-to-gitlab.sh
new file mode 100644
index 00000000..26971191
--- /dev/null
+++ b/common/scripts/copy-pr-to-gitlab.sh
@@ -0,0 +1,6 @@
+PR_USER=$1
+PR_BRANCH=$2
+
+git remote add $1 git@github.com:$1/onnx-web.git
+git fetch $1
+git push gitlab refs/remotes/$1/$2:refs/heads/$1-$2