diff --git a/generators/k8s/default.nix b/generators/k8s/default.nix
index c2b55d4..5c61a7d 100644
--- a/generators/k8s/default.nix
+++ b/generators/k8s/default.nix
@@ -302,8 +302,8 @@ let
     values);
 
   submoduleOf = ref: types.submodule ({name, ...}: {
-    options = definitions.\"\${ref}\".options;
-    config = definitions.\"\${ref}\".config;
+    options = definitions.\"\${ref}\".options or {};
+    config = definitions.\"\${ref}\".config or {};
   });
 
   submoduleWithMergeOf = ref: mergeKey: types.submodule ({name, ...}: let
diff --git a/modules/generated/v1.10.nix b/modules/generated/v1.10.nix
index 98a7519..94e1be5 100644
--- a/modules/generated/v1.10.nix
+++ b/modules/generated/v1.10.nix
@@ -56,8 +56,8 @@ let
     values);
 
   submoduleOf = ref: types.submodule ({name, ...}: {
-    options = definitions."${ref}".options;
-    config = definitions."${ref}".config;
+    options = definitions."${ref}".options or {};
+    config = definitions."${ref}".config or {};
   });
 
   submoduleWithMergeOf = ref: mergeKey: types.submodule ({name, ...}: let
diff --git a/modules/generated/v1.11.nix b/modules/generated/v1.11.nix
index c701166..f615230 100644
--- a/modules/generated/v1.11.nix
+++ b/modules/generated/v1.11.nix
@@ -56,8 +56,8 @@ let
     values);
 
   submoduleOf = ref: types.submodule ({name, ...}: {
-    options = definitions."${ref}".options;
-    config = definitions."${ref}".config;
+    options = definitions."${ref}".options or {};
+    config = definitions."${ref}".config or {};
   });
 
   submoduleWithMergeOf = ref: mergeKey: types.submodule ({name, ...}: let
diff --git a/modules/generated/v1.12.nix b/modules/generated/v1.12.nix
index e484afe..f3d1b44 100644
--- a/modules/generated/v1.12.nix
+++ b/modules/generated/v1.12.nix
@@ -56,8 +56,8 @@ let
     values);
 
   submoduleOf = ref: types.submodule ({name, ...}: {
-    options = definitions."${ref}".options;
-    config = definitions."${ref}".config;
+    options = definitions."${ref}".options or {};
+    config = definitions."${ref}".config or {};
   });
 
   submoduleWithMergeOf = ref: mergeKey: types.submodule ({name, ...}: let
diff --git a/modules/generated/v1.13.nix b/modules/generated/v1.13.nix
index b68aa8c..48b61c9 100644
--- a/modules/generated/v1.13.nix
+++ b/modules/generated/v1.13.nix
@@ -56,8 +56,8 @@ let
     values);
 
   submoduleOf = ref: types.submodule ({name, ...}: {
-    options = definitions."${ref}".options;
-    config = definitions."${ref}".config;
+    options = definitions."${ref}".options or {};
+    config = definitions."${ref}".config or {};
   });
 
   submoduleWithMergeOf = ref: mergeKey: types.submodule ({name, ...}: let
diff --git a/modules/generated/v1.7.nix b/modules/generated/v1.7.nix
index 586f2ef..e58e9e4 100644
--- a/modules/generated/v1.7.nix
+++ b/modules/generated/v1.7.nix
@@ -56,8 +56,8 @@ let
     values);
 
   submoduleOf = ref: types.submodule ({name, ...}: {
-    options = definitions."${ref}".options;
-    config = definitions."${ref}".config;
+    options = definitions."${ref}".options or {};
+    config = definitions."${ref}".config or {};
   });
 
   submoduleWithMergeOf = ref: mergeKey: types.submodule ({name, ...}: let
diff --git a/modules/generated/v1.8.nix b/modules/generated/v1.8.nix
index 167a6c9..d8b33d5 100644
--- a/modules/generated/v1.8.nix
+++ b/modules/generated/v1.8.nix
@@ -56,8 +56,8 @@ let
     values);
 
   submoduleOf = ref: types.submodule ({name, ...}: {
-    options = definitions."${ref}".options;
-    config = definitions."${ref}".config;
+    options = definitions."${ref}".options or {};
+    config = definitions."${ref}".config or {};
   });
 
   submoduleWithMergeOf = ref: mergeKey: types.submodule ({name, ...}: let
diff --git a/modules/generated/v1.9.nix b/modules/generated/v1.9.nix
index fa4c90e..7bc8e9e 100644
--- a/modules/generated/v1.9.nix
+++ b/modules/generated/v1.9.nix
@@ -56,8 +56,8 @@ let
     values);
 
   submoduleOf = ref: types.submodule ({name, ...}: {
-    options = definitions."${ref}".options;
-    config = definitions."${ref}".config;
+    options = definitions."${ref}".options or {};
+    config = definitions."${ref}".config or {};
   });
 
   submoduleWithMergeOf = ref: mergeKey: types.submodule ({name, ...}: let