diff --git a/addons/block_code/block_code_node/block_code.gd b/addons/block_code/block_code_node/block_code.gd
index 8c2b867f..fc03f04f 100644
--- a/addons/block_code/block_code_node/block_code.gd
+++ b/addons/block_code/block_code_node/block_code.gd
@@ -67,6 +67,12 @@ func _update_parent_script():
 
 func _get_configuration_warnings():
 	var warnings = []
+	if self.owner == null:
+		warnings.append("A BlockCode must not be a root node.")
+	if get_parent() is BlockCode:
+		warnings.append("The parent must not be a BlockCode.")
+	if get_parent().find_children("*", "BlockCode", false).size() > 1:
+		warnings.append("The parent should only contain one BlockCode.")
 	if block_script and _get_custom_or_native_class(get_parent()) != block_script.script_inherits:
 		var warning = "The parent is not a %s. Create a new BlockCode node and reattach." % block_script.script_inherits
 		warnings.append(warning)