diff --git a/.terraform/environment b/.terraform/environment
new file mode 100644
index 0000000..89100c4
--- /dev/null
+++ b/.terraform/environment
@@ -0,0 +1 @@
+kbthw-aws-dev
\ No newline at end of file
diff --git a/terraform/aws/variables.tf b/terraform/aws/variables.tf
index 5379a6b..e09f35b 100644
--- a/terraform/aws/variables.tf
+++ b/terraform/aws/variables.tf
@@ -14,9 +14,3 @@ variable "prefix" {
   description = "The prefix to add the name"
   default     = "jibakurei"
 }
-
-variable "prefix" {
-  type        = string
-  description = "The prefix to add the name"
-  default     = "jibakurei"
-}