diff --git a/src/apolo_flow/ast.py b/src/apolo_flow/ast.py
index 19bd0131..0878017b 100644
--- a/src/apolo_flow/ast.py
+++ b/src/apolo_flow/ast.py
@@ -21,6 +21,7 @@
     PlatformResourceURIExpr,
     PrimitiveExpr,
     RemotePathExpr,
+    RemovedStrExpr,
     SequenceT,
     SimpleIdExpr,
     SimpleOptBoolExpr,
@@ -64,6 +65,9 @@ class Project(Base):
     id: SimpleIdExpr
     project_name: SimpleOptStrExpr  # project name can contain "-"
     owner: SimpleOptStrExpr  # user name can contain "-"
+    role: (
+        RemovedStrExpr  # keep it here for a while for the sake of better error message
+    )
 
     images: Optional[Mapping[str, "Image"]] = field(metadata={"allow_none": True})
     volumes: Optional[Mapping[str, "Volume"]] = field(metadata={"allow_none": True})
diff --git a/src/apolo_flow/expr.py b/src/apolo_flow/expr.py
index 51d741f5..ffa47f5b 100644
--- a/src/apolo_flow/expr.py
+++ b/src/apolo_flow/expr.py
@@ -1318,6 +1318,13 @@ class SimpleOptStrExpr(StrExprMixin, NoExprMixin, Expr[str]):
     pass
 
 
+class RemovedStrExpr(NoExprMixin, StrictExpr[str]):
+    type_name: ClassVar[str] = "str"
+
+    def convert(self, arg: TypeT) -> str:
+        raise ValueError("The field is not suppored anymore, {!r} passed")
+
+
 class IdExprMixin:
     type_name: ClassVar[str] = "id"