diff --git a/roles/ansiblehost/meta/main.yml b/roles/ansiblehost/meta/main.yml
new file mode 100644
index 0000000..d098f75
--- /dev/null
+++ b/roles/ansiblehost/meta/main.yml
@@ -0,0 +1,2 @@
+---
+allow_duplicates: no
diff --git a/roles/common/meta/main.yml b/roles/common/meta/main.yml
new file mode 100644
index 0000000..d098f75
--- /dev/null
+++ b/roles/common/meta/main.yml
@@ -0,0 +1,2 @@
+---
+allow_duplicates: no
diff --git a/roles/user/meta/main.yml b/roles/user/meta/main.yml
new file mode 100644
index 0000000..d098f75
--- /dev/null
+++ b/roles/user/meta/main.yml
@@ -0,0 +1,2 @@
+---
+allow_duplicates: no